Use a Formula to Solve the Problem

Multiple Choice

Use a formula to solve the problem
-A pie-shaped (triangular) lake-front lot has a perimeter of 2100 feet. One side is 400 feet longer than the shortest side, while the third side is 500 feet longer than the shortest side. Find the lengths of all three sides.

A) 500 ft, 900 ft, 1000 ft
B) 400 ft, 800 ft, 900 ft
C) 500 ft, 500 ft, 500 ft
D) 100 ft, 200 ft, 300 ft