Lines r and s are such that r || s. Line t is a transversal to these lines. ∠2 = 110°, find ∠7
"
Given line r is parallel to line s; r || s
t is the transversal cutting the two parallel lines in two points.
Given ∠2 = 110°
∠2 = ∠6 = 110° (Corresponding angles)
∠6 and ∠7 form a linear pair
So ∠6 + ∠7 = 180°
110° + ∠7 = 180°
∠7 = 180° - 110° = 70°
∠7 = 70°
 
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