Question

the second angle of a triangle is 4 times as large as the first, the third angle is 80 degree more than the sum of the other two angles. find the measure of all three angles

Answer 1

a+4a+80+4a+a=180
10a+80=180
10a=100
a=10
b=4a=40
c=80+a+b=130

Answer 2

Angle 1: x
Angle 2:4x
Angle 3: 4x+x+80=5x+80
Since the sum of all the angles of a triangle is 180, you can get x+4x+5x+80=180. then by combining like terms, you get 10x=100, and x=10. So angle 1 is 10, angle 2 is 40, and angle 3 is 130.

Answer 3

way to wash rinse and repeat