Question

Solve in simplest radical form

Answer 1

45+90+unknown=180

135+u=180

u=45

so that,

x=15

Answer 2

Explanation:

The ratio of sides of 45 - 45 -90 triangle is

1 : 1 : √2

This is an isosceles triangle. So, the sides opposite to equal angles (45°) are equal.

∵ x = 15