SOLUTION: One angle of a triangle is 20 degrees. The second angle's measurement is four times the third. What is the measure of the third angle?

SOLUTION: One angle of a triangle is 20 degrees. The second angle's measurement is four times the third. What is the measure of the third angle?

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Question 123707: One angle of a triangle is 20 degrees. The second angle's measurement is four times the third. What is the measure of the third angle?
Answer by checkley71(8403) (Show Source): You can put this solution on YOUR website!
20+4X+X=90
5X=90-20
5X=70
X=70/5
X=14 DEGREES IS THE MEASUREMENT OF THE THIRD ANGLE.
PROOF
20+4*14+14=90
20+56+14=90
90=90
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