Question

Look at the figure. Find the value of x.

100


80


45


90

Answer 1

The answer is 90°

The sum of all angle in a triangle is 180°

So,

180-(45+45)

= 180-90

= 90°

Answer 2

Option (d) is correct.

Measure of third angle is 90°

Explanation:

Given : A triangle with measure of its two angle as 45°

We have to find the value of third angle x.

Consider the given triangle,

Using angle sum property of triangle

Sum of angles of a triangle is always 180°

Thus, 45° + 45° + x = 180°

90° + x = 180°

x = 180° - 90°

x = 90°

Thus, Measure of third angle is 90°