Question

Find the measure of angle A.

Answer 1

m∠A = 108º

Explanation:

The total of the angles in a four sides figure is 360

x + 2x + 3x + 4x = 360

Combine like terms

10x = 360

Divide both sides by 10

x = 36

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m∠A = 3x

m∠A = 3(36)

m∠A = 108