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01-05-2019
Mathematics

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How do I find the measure of angle A?

How do I find the measure of angle A class=

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jcherry99 jcherry99

01-05-2019

Answer:

A = 20

Step-by-step explanation:

A + 71x - 1 = 90o That's because all triangles have 180 degrees.

71x - 1 + 20x = 90 Combine like terms.

91x - 1 = 90 Add 1 to both sides.

91x - 1 + 1 = 90 + 1 Combine

91x = 91 Divide by 91

91x/91 = 91/91

x = 1

Angle A = 20x

Angle A = 20*1

Angle A = 20

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