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Explore the fundamentals of angle relationships, including adjacent angles, vertical angles, linear pairs, perpendicular lines, supplementary angles, and complementary angles in the same plane. Enhance your knowledge of angles and their properties.
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Angle Relationships Section 1-5
Adjacent angles • Angles in the same plane that have a common vertex and a common side, but no common interior points. 1 2
Vertical angles • two nonadjacent angles formed by two intersecting lines • Vertical angles are congruent. 4 3
Linear pair • adjacent angles whose noncommon sides are opposite rays • The sum of the measures of the angles in a linear pair is 180. 5 6
Perpendicular lines • special intersecting lines that form right angles • Perpendicular lines intersect to form 4 right angles.
Supplementary angles – 2 angles whose measures have a sum of 180 • Complementary angles – 2 angles whose measures have a sum of 90