Lila made a triangular flag to cheer on her favorite sports team. The perimeter of the flag is 20 inches. A triangular flag is shown. 2 sides have lengths of 8 inches. The total perimeter of the flag is 20 inches.
Heron's formula: Area = StartRoot s (s minus a) (s minus b) (s minus c) EndRoot
Approximately how many square inches of fabric were used to make the triangular flag?
15 square inches
76 square inches
186 square inches
215 square inches
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