Question

Find the value of y in the right triangle below.

A. 40
B. 90
C. 30
D. 50

Answer 1

A. 50

Explanation:

Sum of interior angles of a triangle is always =180 °

Since this is a right triangle, therefore we know that one angle of the triangle measures 90°

Therefor sum of other two angles has to be =
`180\°-90\°=90\°`

One angle measures = 40°

Therefore the missing angle
`y=90\°-40\°=50\°`

`y=50\°`