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Lines l and m are parallel. The marked angles are alternate interior angles. What is the size of each angle?

Class 8Equations in GeometryLinear Equations

A70°
B50°
C18°
D110°

Step-by-Step Solution

Alternate angles are equal:

5 x - 20 = 3 x + 16

, so

x = 18

. Each angle =

5 (18) - 20 = 70

°.

Answer: A) 70°

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