idreaunamcgraw8 idreaunamcgraw8

19-08-2020
Mathematics

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jimthompson5910 jimthompson5910

19-08-2020

The smaller numbers are a bit blurry, but I'm assuming angle 1 is the top-most angle and angle 4 is the corresponding angle to angle 1.

If so, then

angle 1 = angle 4

3x-160 = x+20

3x-x = 20+160

2x = 180

x = 180/2

x = 90 is the answer

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