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Please help me with the attachment below

Please help me with the attachment below
asked 186k views
1 vote
Please help me with the attachment below

Please help me with the attachment below-example-1
asked
User JRunner
by
8.2k points

1 Answer

3 votes
a = 70 (vert. opp. angles)
a+b+90 = 180 (adj. angles on st.line)
70+b+90 = 180
b = 180-90-70
b = 20
answered
User Quasimodo
by
7.6k points
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