Question

“find the measure of angle A” whats the answer for both of them?

Answer 1

255) 36°

257) 30°

Explanation:

The sum of the angle measures in a triangle is 180°.

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255)

(x +43) +(x +77) +74 = 180

2x = -14 . . . . . . . . . . . subtract 194

x = -7

∠A = -7 +43 = 36°

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257)

5x +(3x +2) +130 = 180

8x = 48 . . . . . . . . . . . . . . subtract 132

x = 6

∠A = 5·6 = 30°