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Geometry Unit 2
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Gravity
Terms in this set (12)
Angle
Two rays sharing a common endpoint.
Sides are rays.
Common endpoint is called the vertex
Right Angle
Angle with a degree measure of 90°.
Acute Angle
Angle with a degree measure between 0° and 90°.
Obtuse Angle
Angle with a degree measure between 90° and 180°.
Straight Angle
Angle with a degree measure of 180°.
Adjacent Angles
Two angles in the same plane that have a common vertex and a common side but no common interior points.
Angle bisector
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.
Vertical Angles
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.
Complementary Angles
2 angles whose measure have the SUM of 90
Supplementary Angles
2 angles whose measure have the SUM of 180
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