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OpenStudy (anonymous):
In a triangle, the second angle is twice the measure of the first, and the third angle is three times the measure of the second. Find the measure of the third angle.
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imqwerty (imqwerty):
let the 1st angle be x 2nd angle =2x 3rd angle =6x x+2x+6x=180 9x=180 x=20
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