An architect is planning a triangular pool with a perimeter of 99 ft.
If two of the sides measure 20 and 42, respectively, what is the
length of the missing side?
A) 35 feet
B) 37 feet (Correct Answer)
C) 39 feet
D) 41 feet
Explanation:
To solve, set up the equation, and subtract 20 and 42 from each side:
20 + x + 42 = 99
20 + x + 42 – 20 – 42 = 99 – 20 – 42. Then simplify.
Related Common Core State Standard: 7.EE.4
