A triangular piece of fabric has sides that measure 2 yards, 3 1/3 feet, and 42 inches. Find the square yardage of this fabric

Answer 1

Use Heron's formula.

3 1/3 feet = 12* 31/3 = 40 inches

2 yards = 2*36 = 72 inches

s = (72+42+40)/2 = 77

A = √(s(s-a)(s-b)(s-c)) = √(77(77-72)(77-42)(77-40) = √(77*5*35*37) = 706.10