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

estimate

an answer that is close to an exact answer

fahrenheit

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

geometry

the study of shapes

intersect

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.

quadrangle

a polygon that has four sides and four angles

quadrilateral

a polygon that has four sides and four angles

radius

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