The formula to find the area of a triangle is:
Area = 1/2 * base * height
Plugging in the values:
Area = 1/2 * 28 inches * 20 inches
Area = 1/2 * 560 square inches
Area = 280 square inches
Therefore, 280 square inches of metal is needed to make the sign.
A safety sign is a triangular shape and has a base of 28 inches and a height of 20 inches. Use the triangle area formula to find the number of square inches of metal needed to make the sign.
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