Math-Related Words
![abacus](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fagifs%2Fabacus.GIF)
abacus An abacus is an ancient device that is used for arithmetic calculations. |
![acute angle](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fagifs%2FAcuteangle.GIF)
acute angle An acute angle is less than 90 degrees. |
1+1=2
2+3=5
addition Addition is the adding of numbers to get their sum. |
![angle](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fagifs%2FAngle.GIF)
angle An angle is the amount of rotation it would take to put one intersecting line on top of another. |
1+1=2
7-4=3
arithmetic Arithmetic is the study of addition, subtraction, multiplication, and division. |
1,000,000,000
billion A billion is a thousand million. The Earth is billions of years old. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fggifs%2FGraph.GIF)
chart A chart is a diagram, like a graph or a table, that shows the relationships between things. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Frgifs%2FRadius.GIF)
circle All of the points on a circle are the same distance from the center. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fcgifs%2FCone.GIF)
cone A cone is a shape that has a point at one end and a circular opening at the other end. In mathematics, this shape is a half cone. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fcgifs%2FCouple.GIF)
couple A couple refers to two people or two objects. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fcgifs%2FCrescent.GIF)
crescent A crescent is the shape of the moon a little before of after the time of the new moon. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fcgifs%2FCube.GIF)
cube A cube is a solid geometric figure with six square faces. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fcgifs%2Fcurve.GIF)
curve A curve is a wavy line. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fcgifs%2FCylinder.GIF)
cylinder A cylinder is a figure with a long round body . |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fdgifs%2Fdenominator.GIF)
denominator The denominator is the bottom number in a fraction. |
![diameter](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fdgifs%2FDiameter.GIF)
diameter The diameter is the longest distance from one side of a circle (or a sphere) to the other. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fdgifs%2FDiamond.GIF)
diamond A diamond is a four-sided figure whose sides are all the same length. People play baseball on a diamond-shaped field. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fdgifs%2Fdividend.GIF)
dividend The dividend is the number that is divided (in long division). The dividend divided by the divisor is the quotient (plus a remainder). |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fdgifs%2FDivision.GIF)
division Division is an operation that divides a number into portions. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fdgifs%2Fdivisor.GIF)
divisor The divisor is the number that the dividend is divided by (in long division). The dividend divided by the divisor is the quotient (plus a remainder). |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fdgifs%2FDodecahedron.GIF)
dodecahedron A dodecahedron is a twelve-sided geometric solid whose faces are pentagons. |
2 x double Double means twice or two times. |
**** **** **** 12 dozen Dozen is another word for twelve. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fegifs%2FEight.GIF)
eight Spiders have eight legs. Stop signs have eight sides. |
18
****** ****** ******
eighteen Eighteen is the number between seventeen and nineteen. |
80
eighty Eighty is the number between seventy-nine and eighty-one. |
11
***** ******
eleven Eleven is ten plus one. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fogifs%2FOval.GIF)
ellipse An ellipse is a flattened circle. |
=
equal When two things are equal they are exactly the same in number, quality, or amount. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Ftgifs%2FTriangle.GIF)
equilateral triangle The sides of an equilateral triangle are all the same length. |
0, 2, 4, 6, 8, 10, ...
even number An even number is divisible by two. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Ftgifs%2FThermometer.GIF)
Fahrenheit Fahrenheit is a measure of temperature that is abbreviated F. Water freezes at 32°F and boils at 212°F. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Ffgifs%2Ffirst.GIF)
first The first person or thing comes before the others. |
15
***** ***** ***** fifteen Fifteen is the number after fourteen (14) and before sixteen (16). |
50
fifty Fifty is the number after forty nine (49) and before fifty one (51). |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Ffgifs%2FFive.GIF)
five People have five fingers on each hand. |
40
********** ********** ********** ********** forty Forty is the number after thirty nine (39) and before forty one (41). |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Ffgifs%2FFour.GIF)
four Squares have four sides. Cats and dogs have four legs. |
14
******* ******* fourteen Fourteen is the number after thirteen (13) and before fifteen (15). |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Ffgifs%2FFractal.GIF)
fractal Fractals are patterns within patterns within patterns. |
1/2
fraction A fraction is a part of a whole. Half of an apple is a fraction of an apple. The top number in a fraction is called the numerator; the bottom number in a fraction is called the denominator. |
![angle](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fagifs%2FAngle.GIF) geometry Geometry is the mathematical study of points, lines, angles, and solids. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fggifs%2FGraph.GIF)
graph A graph is a diagram that shows relationships between things. |
>
greater than The mathematical symbol > means "greater than." When one number is greater than a second number, the first one is bigger than the second. For example, 4 is greater than 2, or 4 > 2. |
1/2
half When something is divided into two equal parts, each of these two parts is half of the original object. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fhgifs%2FHeart.GIF)
heart The heart is a shape that often symbolizes love. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fhgifs%2FHeptagon.GIF)
heptagon A heptagon is a seven-sided figure. |
hexaflexagon A hexaflexagon is a folded geometric figure that can be "flexed" to expose its many sides. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fhgifs%2FHexagon.GIF)
hexagon A hexagon is a six-sided figure. Beehives have hexagonal cells. |
100
hundred One hundred is the number after 99 and before 101. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Figifs%2FIcosahedroncolored.GIF)
icosahedron An icosahedron is a twenty-sided geometric solid. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Figifs%2Fisocelestriangle.GIF)
isosceles triangle An isosceles triangle has two sides that are the same length and two angles that are the same. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fkgifs%2FKiteshape.GIF)
kite A kite is a four-sided figure in which the two pairs of adjacent sides have the same length. |
<
less than The mathematical symbol < means "less than." When one number is less than a second number, the first one is smaller than the second. For example, 1 is less than 2, or 1 < 2. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Flgifs%2FLineseg.GIF)
line segment A line segment is a portion of a line. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Flgifs%2Flongdivision.GIF)
long division In long division, the dividend is divided by the divisor, resulting in a quotient plus a remainder. |
magic square In a magic square, the rows, columns, and diagonals all add up to the same number. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fngifs%2FNumbers.GIF)
mathematics Mathematics is the study of numbers, shapes, patterns, and logical reasoning. |
1,000,000
million A million is a thousand thousands. The dinosaurs lived millions of years ago. |
-
minus The mathematical symbol - means "minus." Four minus three is written, 4 - 3. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fmgifs%2FMobius.GIF)
Möbius strip A Möbius strip is a piece of paper with only one side! |
1 x 2 = 2
2 x 3 = 6
multiplication Multiplication is a mathematical operation used to compute areas and do other calculations. |
x
multiply The mathematical symbol x means "multiply." Four times three is written, 4 x 3. |
![nine](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fngifs%2FNine.GIF)
nine There are nine planets in our solar system and nine players on a baseball team. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fngifs%2FNumberline.GIF)
number line Numbers correspond to points on a number line. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fngifs%2FNumbers.GIF)
number Numbers tell you "how many" or "how much." |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fngifs%2Fnumerator.GIF)
numerator The numerator is the top number in a fraction. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fogifs%2FObtuseangle.GIF)
obtuse angle An obtuse angle is greater than ninety degrees. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fogifs%2FOctagon.GIF)
octagon An octagon is an eight-sided figure. Stop signs are octagons. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fogifs%2FOctahedron.GIF)
octahedron An octahedron is an eight-sided geometric solid. |
1, 3, 5, 7, 9, 11, ...
odd number An odd number is not divisible by two. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fogifs%2FOne.GIF)
one One is a small number. |
1/2
one half When something is divided into two equal parts, each of these two parts is one half of the original object. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fogifs%2FOrb.GIF)
orb A ball-shaped object is an orb. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fogifs%2FOval.GIF)
oval An oval is an egg-shaped figure. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fpgifs%2FParallel.GIF)
parallel Parallel lines extend in the same direction, are always the same distance apart, and never meet. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fpgifs%2FParallelogram.GIF)
parallelogram A parallelogram is a four-sided figure whose opposite sides are parallel. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fpgifs%2FPattern.GIF)
pattern A pattern is something that is repeated. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fpgifs%2FPentagon.GIF)
pentagon A pentagon is a five-sided figure. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fp2gifs%2Fperimeter.GIF)
perimeter Perimeter is the distance around the edges of a figure. For example, the perimeter of a square with side length of a is a+a+a+a=4 times a. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fmath%2Fgifs%2Fperpendicular.GIF)
perpendicular When two lines are perpendicular, they are at right angles (90 degrees). |
.
point A point is an exact location, a spot with no width or thickness. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fpgifs%2FPolygons.GIF)
polygon A polygon is a many-sided figure with straight edges. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fogifs%2FOctahedron.GIF)
polyhedron Polyhedra are solids whose faces are polygons. |
2,3,5, 7,11, 13,17...
prime number A prime number is a positive number that has exactly two factors, 1 and itself. Alternatively, you can think of a prime number as a number greater than one that is not the product of smaller numbers. For example, 13 is a prime number because it can only be divided evenly by 1 and 13. For another example, 14 is not a prime number because it can be divided evenly by 1, 2, 7, and 14. The number one is not a prime number because it has only one factor, 1 itself. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fmath%2Fgifs%2Fprotractor.GIF)
protractor A protractor is a device that measures angles. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fpgifs%2FPyramid.GIF)
pyramid A pyramid is a shape that has a flat polygonal base and triangular sides that meet at a point on the top. The pyramids in Egypt are huge buildings build by ancient Egyptians. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Ftgifs%2FTrapezoid.GIF)
quadrilateral A quadrilateral is a four-sided figure. The square, rectangle, rhombus, trapezoid, kite, and parallelogram are quadrilaterals. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fqgifs%2Fquotient.GIF)
quotient The quotient is the answer in long division. The dividend divided by the divisor is the quotient (plus a remainder). |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Frgifs%2FRadius.GIF)
radius The radius is the distance from the center of a circle (or a sphere) to the edge. |
1/2
ratio A ratio is the relationship between two numbers, as defined by the result you get when you divide one by the other. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Frgifs%2FRectangle.GIF) rectangle A rectangle is a four-sided figure whose sides are at right angles to each other. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Frgifs%2Fremainder.GIF)
remainder The remainder is the fractional part of the answer in long division. The dividend divided by the divisor is the quotient plus the remainder. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Frgifs%2FRhombus.GIF)
rhombus A rhombus is a parallelogram with equal-length sides. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Frgifs%2FRightangle.GIF)
right angle A right angle looks like the corner of a square; it extends ninety degrees. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Frgifs%2FRighttriangle.GIF) right triangle A right triangle has one angle that is a right angle (extending 90 degrees). |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fmath%2Fgifs%2Fromannumerals.GIF)
Roman numerals Thousands of years ago, in ancient Rome, the Romans used a system of numbers that we call Roman numerals. In this system, I=1. V=5, X=10, L=50, C=100, D=500, and M=1,000. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fsgifs%2Fscalenetriangle.GIF)
scalene triangle The sides of a scalene triangle are all different lengths. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fmgifs%2Fmiddle.GIF)
second The second person or item comes after the first and before the third. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fsgifs%2FSemicircle.GIF)
semicircle A semicircle is half a circle. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fsgifs%2FSeven.GIF)
seven There are seven days in the week. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fsgifs%2FShapes.GIF)
shapes Everything has a shape. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fsgifs%2FSix.GIF)
six Insects have six legs. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fogifs%2FOrb.GIF)
sphere A sphere is a ball-shaped object. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Frgifs%2FRed.GIF)
square A square has four, equally long sides which are at right angles to each other. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fsgifs%2FStar.GIF)
star A star is a shape that has many points. |
1-1=0
5-3=2
subtraction Subtraction is the operation of taking one number away from another. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fmath%2Ftally%2Ftallytable2.GIF)
tally marks Tally marks are a quick way of keeping track of numbers in groups of five. One vertical line is made for each of the first four numbers; the fifth number is represented by a diagonal line across the previous four. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Ftgifs%2FTen.GIF)
ten People have ten fingers and ten toes. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Ftgifs%2FTetrahedron.GIF)
tetrahedron A tetrahedron is a pyramid formed by four triangles. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Ftgifs%2Fthird.GIF)
third The third person or item comes after the first and second. |
13 ****** ******* thirteen Thirteen is the number after twelve (12) and before fourteen (14). |
30 ********** ********** ********** thirty Thiry is the number after twenty nine (29) and before thirty one (31). |
1,000
thousand One thousand is a whole number that is equal to 100 times 10. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Ftgifs%2FThree.GIF)
three Three is the number between 2 and 4. A tricycle has three wheels. A triangle has three sides. A Triceratops has three horns. Tri means three! |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fbgifs%2FBagel.GIF)
torus A torus is a doughnut-shaped object. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Ftgifs%2FTrapezoid.GIF)
trapezoid A trapezoid is a four-sided figure with exactly two parallel sides. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Ftgifs%2FTriangle.GIF)
triangle A triangle has three sides. |
12 ****** ******
twelve Twelve (12) is the number between eleven (11) and thirteen (13). Dozen is another word for twelve. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Ftgifs%2Ftwentyapples.GIF)
twenty There are twenty (20) apples above. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Ftgifs%2FTwo.GIF)
two We have two eyes, two ears, two arms, and two legs. |
1 + 1 ≠ 3
unequal Two things are unequal if they are not the same. |
![](https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Fwww.enchantedlearning.com%2Fvgifs%2FVenndiagram.GIF)
Venn diagram A Venn diagram is a diagram that uses overlapping circles to show relationships among sets of things. |
0
zero Zero is a number that stands for the absence of size or quantity. | |