Question

A side of the triangle below has been extended to form an exterior angle of 133º. Find the value of x. 133° 21° xo

Answer 1

In order to find the value of x, we need to remember that the sum of the interior angles of a triangle is 180°

so we have the next equation

21+x+(180-133)=180

21+x+47=180

x=180-21-47

x=112°