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Section 2-4
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Section 2-4 Special Pairs of Angles
1 2 Complementary Angles • Two angles whose measures have the sum of 90 degrees are complementary angles Each angle is called the complement of the other. Ex: is the complement of
3 4 Supplementary Angles • Two angles whose measures have the sum of 180 degrees are supplementary angles. Each angle is called the supplement of the other. Ex: is the supplement of
Vertical Angles • Formed when two lines intersect. Need to know the following theorem: Vertical Angles are Congruent. In other words, vertical angles have the same angle measure. 1 2
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