Question 365988: In a triangular cross section of a roof, the seconf angle is twice as large as the first. The third angle is 20 greater than the first angle. how large are the angles?
first angle = x
second angle = 2x
third angle = x+20
Answer by amoresroy(361)   (Show Source):
You can put this solution on YOUR website! In a triangular cross section of a roof, the seconf angle is twice as large as the first. The third angle is 20 greater than the first angle. how large are the angles?
first angle = x
second angle = 2x
third angle = x+20
Since the sum of 3 angles in a triangle is 180, the equation is
x+2x+(x+20) = 180
4x = 180 -20
x = 40
2x = 2(40) = 80
x+20 = 40+20 = 60
The angles are 40, 80, & 60.
The sum is 180.
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