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
The formula for the area of a triangle is:
Area = 0.5 * base * height
Plugging in the values:
Area = 0.5 * 28 * 20
Area = 0.5 * 560
Area = 280 square inches
Therefore, 280 square inches of metal is needed to make the safety sign.