Question

the angles of an triangle are (x-90) , (x-20) and (1/2x - 10) . find the value of x and then the angles of an triangle.

Answer 1

We know that sum of all the angles of a triangle is 180°

So,
x - 90 + x - 20 + x/2 - 10 = 180
x + x + x/2 - 90 - 20 - 10 = 180
5x/2 - 120 = 180
5x/2 = 300
x = 120°

Value of x = 120
Now the angles are --->
x - 90 = 120 - 90 = 30°
x - 20 = 120 - 20 = 100°
x/2 - 10 = 120/2 - 10 = 50°

Hope This Helps You!

Answer 2

Answer:

I hope it is helpful....................