Question

In a triangle the first angle is 10 degrees more than the second angle. The third angle is equal to the sum of first 2 angles . Find the value of all three angles

Answer 1

First angle= x+10
Second angle = x
Third angle = x+x+10 or 2x+10

X+10+x+2x +10=180
4x+20=180
Subtract 20 from both sides
4x=160
Divide both sides by 4
X=40
First angle =50
Second angle=40
Third angle =90