Mathematics
Vanebuen
15

Help please! What is the measure of angle A in the triangle?

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(1) Answers
emiliebozik

The answer is 50 Degrees  because all the angles in a triangle = 180 so you set all three angles = to 180 3x+20+70=180 then you combine alike terms 3x+ 90= 180 then you move the 90 to the other side of the = sign so you subtract it from 180 3x=90 then you divide 90 by 3 to get x by itself 90/3=30  so x=30 then you put you x in for angle A 2(30)-10=50 because 2* 30 equals 60 and 60 - 10 =50

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