Question

If angle A and angle B are supplementary angles and measure angle B = (x+20)°, then what would be measure angle A? ​

Answer 1

Answer:

angle A+angle B=180

x+x+20=180

2x=160

x=80

angle A=80°

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Answer 2

Angle B=x+20
B+A=180
A=180-x-20
A=-x+160