MATH

right triangle

triangle with one right angle

regular polygon

polygon in which all sides and angles are congruent

Radius

line segment whose endpoints are the center of the circle and any point on the circle

Skew Lines

lines in different planes that never intersect

perpendicular lines

intersecting lines that form 90 degree angles

diameter

line segment that passes through the center of a circle and its endpoints are on the circle

Vertex of a polygon

the common endpoint of two sides of a polygon

obtuse triangle

triangle with one angle greater than 90 but less than 180