Download Congruent Complements Theorem

Geometry Concepts
Name: _____________________________
Lesson 2.3: Complementary and
Date: __________________ Block: ______
Supplementary Angles
Complementary Angles: ________________________________________________________
Supplementary Angles: _________________________________________________________
Example 1: Determine whether the angles are complementary, supplementary, or neither.
a. 22º and 158º
b. 15º and 85º
c. 55º and 35º
Adjacent Angles: ______________________________________________________________
______________________________________________________________________________
Diagram:
Example 2: Determine whether the numbered angles are adjacent or nonadjacent.
a.
b.
c.
Theorem: _____________________________________________________________________
______________________________________________________________________________
Diagram:
Congruent
Complements
Theorem
Symbols:
Diagram:
Congruent
Supplements
Theorem
Words:
Words:
Symbols:
Example 3:  7 and  8 are supplementary.  8 and  9 are
supplementary. Name a pair of congruent angles. Explain your
reasoning.