an angle that measures less than 90o | Acute Angle |
angles that share a common side | Adjacent Angles |
interior angles of a transversal with the same measure | Alternate Interior Angles |
exterior angles of a transversal with the same measure | Alternate Exterior Angles |
formed when two rays have the same endpoint | Angle |
the sum of adjacent angles equals 90o | Complementary Angles |
angles with the same measure | Congruent Angles |
Angles that are in the same position (matchers) on a transversal | Corresponding Angles |
an angle that measures greater than 90o | Obtuse Angle |
angles that are across from each other - usually congruent | Opposite Angles |
a device that is used to measure an angle | Protractor |
an angle that measures 90o | Right Angle |
one of the rays that form an angle | Side |
an angle measuring 180o | Straight Angle |
the sum of adjacent angles equals 180o | Supplementary Angles |
The point where two rays meet to form an angle | Vertex |
angles that are opposite each other when lines intersect. (congruent) | Vertical Angles |