# Activity 2.5.3 Identifying Angle Pairs

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Activity 2.5.3 Identifying Angle Pairs
β‘ at B and line π»π·
β‘ at A. Use the figure below to answer
AB is a transversal intersection line πΆπΈ
these questions:
1. ∠πΈπ΅π΄ and ∠_________ are a pair of corresponding angles.
2. ∠πΉπ΅πΆ and ∠_________ are a pair of vertical angles.
3. Name another pair of vertical angles.
4. ∠πΆπ΅π΄ and ∠_________ are a pair of alternate interior angles.
5. ∠π΅π΄π· and ∠_________ are a linear pair of angles.
6. Name one pair of same side interior angles.
7. Name an angle that must be congruent to angle ∠πΊπ΄π».
β‘
In this figure, M is a point on π½πΏ
8. Suppose m∠πΎππ½ = 55&deg;. Find
m∠πΏππΎ.
9. Suppose m∠πΏππΎ is twice the size of
m∠πΎππ½. Find the measure of each
angle.
10. Suppose m∠πΎππ½ is 80&deg; less than
m∠πΏππΎ. Find the measure of each
angle.
11. Do you agree or disagree with this
statement “If ∠πΎππ½ is an acute angle, then m∠πΏππΎ must be an obtuse angle”? Explain