Question

the measure of angles of a triangle are x°,(x-20°) ,(x-40°) . find the measure of each angle​

Answer 1

Given angles are:-

x, x - 20 and x - 40.

Sum of all angle in a triangle = 180°

$x + x - 20 + x - 40 = 180 \\ \\ 3x - 60 = 180 \\ \\ 3x = 180 + 60 \\ \\ 3x = 240 \\ \\ x = \frac{240}{3} \\ \\ x = 80$

So the angles are

x = 80°

x - 20 = 80 - 20

= 60°

x - 40 = 80 - 40

= 40°

Hope it helps.