Given:
The figure of a right angle triangle.
To find:
The value of x and measures of all angles of the triangle.
Solution:
According to the angle sum property, the sum of all interior angles of a triangle is 180 degrees.
Using angle sum property, we get




It can be written as

Divide both sides by 2.

The value of x is -10.
Now,



And,



Therefore, the value of x is -10, measure of angle A is 40 degrees and measure of angle B is 50 degrees.