SOLUTION: In a triangle ABC,angle B is twice angle A and angle C is 20 degrees smaller than angle B. What are sizes of the three angles of the triangle?
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Question 843491: In a triangle ABC,angle B is twice angle A and angle C is 20 degrees smaller than angle B. What are sizes of the three angles of the triangle? Answer by Cromlix(4381) (Show Source):
You can put this solution on YOUR website! Angle A = x
Angle B = 2x
Angle C = 2x - 20
Angles A, B and C = 180 degrees
x + 2x + 2x - 20 = 180
5x - 20 = 180
5x = 180 + 20
5x = 200
x = 200/5
x = 40 degrees.
Angle A = 40 degrees
Angle B = 80 degrees
Angle C = 60 degrees
Hope this helps.
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