No the side lengths of 9,12, and 18 doesn’t form a right triangle. Posted a picture showing all the side length that is a right triangle.
B. is the correct answer you got it right
Malory your fellow helper
Answer:
Complementary
Step-by-step explanation:
Complementary Angles add up to 90°
Supplementary Angles add up to 180°
60 + 30 = 90
(6.5 + p)/3
or
1/3(6.5 + p)
same answer written a different way