Angle C of triangle ABC is 60 degrees. Angle B is 40 degrees less than angle A. Find angle B.
| September 6, 2021 | education
The angles of a triangle add up to 180 degrees;
Angle C is 60 degrees;
The sum of the angles A and B is 180 – 60 = 120 degrees;
Angle B is 40 degrees less than angle A, then:
A + (A – 40) = 120;
2A = 160;
A = 80 degrees;
B = A – 40 = 40 degrees;
Answer: Angle B is 40 degrees;
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