Answer:
C.
Step-by-step explanation:
Because angle TQR & angle TRU are complementary angles, meaning they add up to 90º.
So if TQR = 18, then:
(X- the measure of TRU)
X + 18 = 90
solve for x:
X + (18-18) = 90 - 18
X= 72
Hope this helps! Have a great day!