Geometry Basic Vocabulary (Angles)
The intersection of two non collinear rays at a common endpoint. The rays are called sides and the common end point is called the vertex.
the common endpoint
A ray that divides and angle into the congruent angles.
Two angles with measures that have a sum of 90.
Two angles with measures that have a sum of 180.
two nonadjacent angles formed by two intersecting lines.
L 1 and L 3 are vertical angles
L 2 and L 4 are vertical angles
Two angles that lie in the same plane have a common vertex and a common side, but no common interior points.
A pair of adjacent angles whose non common sides are opposite rays.
A unit of measure used in measuring angles and arcs. An arc of a circle with a measure of 1* is 1/360 of the entire circle.
an angle with a degree measure less than 90.
an angle with degree measure greater than 90 and less than 180.
An angle with a degree measure of 90.