Math Terminology 1

Question 1

Perimeter

Answer 1

The distance around a figure.

Question 2

Circumference

Answer 2

The distance around a circle.

Question 3

Acute angle

Answer 3

An angle that measures less than 90 degrees.

Question 4

Angle

Answer 4

A figure formed by 2 rays that have the same endpoint.

Question 5

Capacity

Answer 5

A measure of how much liquid a container can hold.

Question 6

Array

Answer 6

An arrangement of objects or pictures in equal columns and rows.

Question 7

Concentric circles

Answer 7

Circles that have the same center but different diameters.

Question 8

Congruent

Answer 8

Same size, same shape.

Question 9

Consecutive

Answer 9

Following in order without interruption.

Question 10

Denominator

Answer 10

The number below the bar in a fraction. The denominator names the total number of equal parts.

Question 11

Diameter

Answer 11

The distance across the circle going through the middle.

Question 12

Difference

Answer 12

Answer to a subtraction problem.

Question 13

Dividend

Answer 13

The number being divided in division.

Question 14

Divisor

Answer 14

The number that divides the dividend in division.

Question 15

Equivalent fractions

Answer 15

Different fractions that name the same number.

Question 16

Expanded form

Answer 16

A number written to show the value of each digit.

Question 17

Factor

Answer 17

A number times another number.

Question 18

Fraction

Answer 18

A number that names a part of a whole, a part of a collection, or a part of a region.

Question 19

Hexagon

Answer 19

A six sided figure.

Question 20

Horizontal

Answer 20

Side to side.

Question 21

Hundredth

Answer 21

On of the 100 equal parts of a whole.

Question 22

Intersecting lines

Answer 22

Lines that meet or cross at a common point.

Question 23

Interval

Answer 23

The space or distance between two points on a scale or number line.

Question 24

Line

Answer 24

A straight path that extends infinitely in opposite directions.

Question 25

Line of symmetry

Answer 25

A line that divides a figure into two equal parts that match when folded on the line.

Question 26

Line segment

Answer 26

Part of a line defined by two endpoints along the line.

Question 27

Mass

Answer 27

The amount of matter in an object.

Question 28

Mixed number

Answer 28

A number containing a whole number part and a fraction part.

Question 29

Numerator

Answer 29

The top number of the fraction. The numerator names the number of equal parts.

Question 30

Obtuse angle

Answer 30

An angle that measures more than 90 degrees and less that 180 degrees.

Question 31

Octagon

Answer 31

An eight sided figure.

Question 32

Parallel

Answer 32

Lines that stay the same distance apart and never meet.

Question 33

Parallelogram

Answer 33

A quadrilateral that has two pairs of parallel lines.

Question 34

Pentagon

Answer 34

A five sided figure.

Question 35

Period

Answer 35

Each group of three digits in a number separated by a comma.

Question 36

Perpendicular

Answer 36

Lines that intersect at 90 degrees.

Question 37

Polygon

Answer 37

A simple closed two-dimensional figure made up of three or more line segments.

Question 38

Product

Answer 38

Answer to a multiplication problem.

Question 39

Proper fraction

Answer 39

A fraction that names a number between 0 and 1. The numerator is less than the denominator.

Question 40

Quadrilateral

Answer 40

A polygon with four sides and four vertices.

Question 41

Quotient

Answer 41

Answer to a division problem.

Question 42

Radius

Answer 42

The distance from the center to the edge of a circle.

Question 43

Ray

Answer 43

Are parts of a line that extend in one direction from one endpoint to infinity.

Question 44

Reflection

Answer 44

Flipping a figure

Question 45

Rhombus

Answer 45

A parallelogram with all four sides the same length.

Question 46

Right angle

Answer 46

An angle that measures 90 degrees.

Question 47

Rotation

Answer 47

Spinning a figure.

Question 48

Standard form

Answer 48

The simplest way to show a number using digits.

Question 49

Sum

Answer 49

Answer to an additional problem.

Question 50

Tenth

Answer 50

One of the 10 equal parts of a whole or collection.

Question 51

Transformation

Answer 51

Way of changing the position of a figure including rotation, reflection and translation.

Question 52

Translation

Answer 52

Sliding a figure

Question 53

Trapezoid

Answer 53

A quadrillateral with exactly on pair of parallel sides.

Question 54

Vertex

Answer 54

The corner of an angle.

Question 55

Vertices

Answer 55

More than one vertex.

Question 56

Vertical

Answer 56

Up and down.

Question 57

Volume

Answer 57

The number of cubic units that fit inside a three-dimensional figure.

Question 58

Weight

Answer 58

A measure of how much gravity pulls on an object.

Question 59

Area

Answer 59

The number of squares to cover the surfact of a figure.

Question 60

Equivalent

Answer 60

Equal.