In the figure below, determine .
Step 1: Determine the sum of .
The sum of a triangle's angle measures is . So, in
, we can determine the sum of by subtracting from
Step 2: Determine the sum of .
is twice the measure of , and is twice the measure of . Therefore, the sum
of is twice the sum of .
Step 3: Determine .
Subtract the sum of 's other two angle measures