CPM Homework Help : GC Problem 8-6

Solve for $x$ in each diagram below.

Hint (all):

The Triangle Angle Sum Theorem states that the sum of all the interior angles in a triangle will be $180^\circ$ .
Find the missing angle in each triangle.

More Help (all):

The sum of supplementary angles is $180^\circ$ .
Solve for $x$ using the general equation $\text{missing angle}+x=180^{\circ}$ .

Answer (a):
$x = 110^\circ$

Answer (b):
$x = 70^\circ$