Question 265139
Find the 3 angles of a triangle if one angle is 20 degrees greater than the smallest angle and the third angle is twice the smallest angle. 
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Call the smallest angle A.
The 3 angles are A, A + 20, and 2A.
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A + A+20 + 2A = 180
4A + 20 = 180
4A = 160
A = 40  (smallest angle)
A+20 = 60 (2nd angle)
2A = 80 (3rd angle)