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Find the measure of angle A.

Find the measure of angle A.
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Find the measure of angle A.

Find the measure of angle A.-example-1
asked
User JuicyFruit
by
9.0k points

1 Answer

6 votes

Answer:

112.6°

Explanation:

Using cosine law:

20² = 11² + 13² - 2(11)(13)cos(A)

110 = -286cos(A)

cos(A) = -5/13

A = 112.6198649

answered
User Lindz
by
8.5k points
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