line l ll line m and line n is a transversal
I La=60Chen
then find
Lb. Le, Ld
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Answer:
Given:l∥m
sum of the interior angles on the same side of transversal is 180
∘
b+52
∘
=180
∘
⇒b=180
∘
−52
∘
=128
∘
And a=52
∘
∴a=52
∘
,b=128
∘
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