22 terms

Adjacent Angles

side by side, these angles share a common ray

Angles

formed by two rays with a common endpoint (vertex)

Area

space taken up by a two-dimensional shape

Base

in two-dimensional shapes it is bottom of a shape (perpendicular to the height) used to calculate area; in three-dimensional figure it is the flat surface used to calculate volume

Circumference

distance around the exterior of a circle

Complementary Angles

sum of 90°, these angles add up to 90°

Degrees

measurement used to measure angles

Diameter

distance across a circle through the center of the circle

Exterior Angle

the angle between any side of a shape and a line extended from the next side

Height

measure of a shape used to calculate area, always perpendicular to the base

Interior Angle

an angle inside a shape

Radius

distance from the center of a circle to any point on the outside of the circle

Side

flat edge of a two-dimensional shape; flat face of a three-dimensional figure

Supplementary

sum of 180°, these angles add up to 180°

Surface Area

the combined area of all the faces of a three-dimensional figure

Three-Dimensional Figures

have length, width (or depth), and height

Two-Dimensional Figures

have length and width

Vertical Angles

these angles are formed by intersecting lines, share a common vertex, but no common sides, and are congruent (equal in measure)

Volume

space inside a three-dimensional figure

Unique Triangle

a triangle that can only be drawn one way

Cross Section

the two-dimensional shape you get when you slice a three-dimensional figure

Corresponding Angles

the angles that occupy the same relative position at each intersection where a straight line crosses two others