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Geometry Unit 2
Terms in this set (12)
Two rays sharing a common endpoint.
Sides are rays.
Common endpoint is called the vertex
Angle with a degree measure of 90°.
Angle with a degree measure between 0° and 90°.
Angle with a degree measure between 90° and 180°.
Angle with a degree measure of 180°.
Two angles in the same plane that have a common vertex and a common side but no common interior points.
A ray that cuts an angle into two congruent adjacent angles.
Angle Addition Postulate
If point X lies in the interior of < AOC, then
m< AOX + m< XOC = m<AOC.
2 angles that have the sides of one angle are opposite rays to the sides of the other angle. (When two lines intersect they form vertical angles.)
Vertical Angle Theorem
Vertical angles are congruent.
2 angles whose measure have the SUM of 90
2 angles whose measure have the SUM of 180