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What is the measure of angle A?

What is the measure of angle A?
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4 votes
What is the measure of angle A?

What is the measure of angle A?-example-1
User Webrsk
by
8.1k points

1 Answer

2 votes

Answer:

∠A = 58°

Explanation:

The exterior angle of a triangle is equal to the sum of the 2 opposite interior angles.

∠ACD is an exterior angle

∠A and ∠B are the opposite interior angles, thus

∠A + 80 = 138 ( subtract 80 from both sides )

∠A = 58°

User Kanenas
by
7.9k points
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