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Angles

Acute An angle that measures less than 90°
Obtuse An angle that measures more than 90°
Right An angle that measures exactly 90°
Complementary Angles Two angles whose sum is 90°
Supplementary Angles Two angles whose sum is 180°
Adjacent Angles that share a vertex and a common side. (Vertex is the corner)
Vertical Angles Angles formed by two intersecting lines that are opposite each other, they have equal angle measures.
Congruent Angles that are related because they have the same measure
Parallel Lines Lines that are the same distance apart at all times and will never cross
Perpendicular Lines Lines that intersect at a 90° angle
Transversal A line that intersect two other lines
Alternate Interior Angles Angles are formed when a transversal passes through two lines. The angles that are formed on opposite sides of the transversal and inside the two lines are __________________.
Alternate Exterior Angles Angles are formed when a transversal passes through two lines. The angles that are formed on opposite sides of the transversal and outside the two lines are ______________.
Corresponding Angles are formed when a transversal passes through two lines. The angles that are formed in the same position. If the two lines are parallel the _____________ angles are equal.
Created by: mmsmath7