# Math Vocabulary

## 31 terms · third grade, math, vocabulary

### angle

a figure that is formed by two rays or two line segments that have the same endpoint

### apex

the vertex of a cone or the vertex where the faces that are not a base of a pyramid meet

### area

the amount of surface inside a shape

### array

An arrangement of objects in rows and columns

### circumference

the distance around a circle, or its perimeter

### congruent

two figures that have the same shape and same size

### degree

a unit of measure for angles and for temperature

### diameter

a line segment that goes through the center of a circle and has endpoints on the circle

### fahrenheit

the temperature scale used in the U.S. customary system

### geometry

the study of shapes

to meet or cross

### line

a straight path that goes on forever in both directions

### maximum

the largest number in a set of data

### mean

an average number in a set of data

### median

the middle number in a set of data, when the numbers are put in order from smallest to largest, or largest to smallest

### minimum

the smallest number in a set of data

### mode

the number or value that occurs most often in a set of data

### parallel

always the same distance apart, and never meeting or crossing each other

### parallelogram

a 4-sided polygon that has 2 pairs of parallel sides that are the same length

### polygon

a closed figure on a flat surface that is made up of line segments joined end to end.

a polygon that has four sides and four angles

a polygon that has four sides and four angles

a line segment that goes from the center of a circle to any point on the circle

### range

the difference between the biggest (maximum) and the smallest (minimum) numbers in a set of data

### rectangle

a parallelogram whose corners are all right angles

### sphere

a solid with a curved surface that looks like a ball or a globe

### trapezoid

a 4-sided polygon with exactly one pair of parallel sides

### triangle

a polygon that has three sides and three angles

### vertex

the point where the rays of an angle or the sides of a polygon meet

### perimeter

the distance around a shape