Question

one of the angle of a right angle triangle is 40 degree find the other angle of the triangle

Answer 1

Angles are 90

Second angle 40

Third angle is 180-(90+40)=50

Answer 2

In a right angle triangle one angle is always 90
Given that another angle is 40
Also angle sum property of any triangle is 180

This implies
90 + 40 + x = 180
x = 50