Question

What is the value of x based on the relationships in this
triangle?

Answer 1

Your answer is 12°

The angles in triangle always add up to 180.

You can set up an equation using that information:

(2x+1)+(5x+5)+90=180

Combine like terms:

7x+96=180

Subtract 96 from both sides

7x=84

Finally, divide 7 from both sides and you get

X=12