This document defines and provides examples of different types of angles and their relationships when lines or parallel lines are intersected. It discusses adjacent angles, opposite angles, vertical angles, supplementary angles, complementary angles, corresponding angles, alternate interior angles, and alternate exterior angles. Examples applying these angle relationship concepts are provided.

1. Lesson 54:
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*adjacent angles – share a common vertex and a common side
but do not overlap
*opposite angles – formed by 2 intersecting lines and share the
same vertex but do not share a side
*vertical angles – same as opposite angles [congruent to each
other]
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2. *supplementary angles - 2 angles whose measures total 180 degrees
*complementary angles - 2 angles whose measures total 90 degrees
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3. *transversal – the third line that cuts into a set of parallel
lines 1 2
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*corresponding angles – angles on the same side of the
transversal and on the same side of each of the parallel
lines
*alternate interior angles – angles on opposite sides of the
transversal and between the parallel lines
*alternate exterior angles – angles on opposite sides of the
transversal and outside the parallel lines
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4. Examples (Lesson 54):
pg. 371
A)
B)
C)
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5. D)
E)
F)
G)
H)
I)
J)
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