Question

What is the value of u?
u+48°
u+9°
u+17°

Answer 1

u = 22

Explanation:

we use the property that if a line is separated by another, the two adjacent angles are equal to 180.

so, we can find the remaining angle in the triangle, as the sum of that and u+48 is equal to 180.

`180-(u+48)=132-u`

next, use the property that the sum of angles in a triangle is equal to 180.

so, we sum them up:

`u+9+u+17+132-u` simplifies to
`u+158=180`.

then, subtract both sides with 158, and you get
`u=22`.