Two of the sides are 8 in.
Lila made a triangular flag to cheer on her favorite sports team. The perimeter of the flag is 20 inches.
Heron's formula: Area = square root s (s-a) (s-b) (s-c)
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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