Answer:
x = 180 - 118 - 34.6 = 27.4
Step-by-step explanation:
The sum of the internal angles of each type of (2D) polygon will only have 1 specific value for each polygon. In the case of a triangle, the interior angles add up to 180 degrees.
Using a statement-reason approach, we start by saying:
Q^ + R^ + S^ = 180 degrees (*) Interior angles of a triangle = 180
(*Please use proper notation if you were already taught it - these computer keyboards can only do so much you know...)
Then you just solve normally for x:
34.6 + 118 + x = 180
x = 180 - 118 - 34.6
x = 27.4 degrees
