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Section 2-4

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.

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Section 2-4

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  1. Section 2-4 Special Pairs of Angles

  2. 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. 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

  4. 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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