A school crossing sign has the dimensions shown. The sign can be thought of as a composite figure of a rectangle and a triangle, or two identical trapezoids. The area of the sign is ____ in2. (Enter only the number.) ...?

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Below is the answer:

Area of rectangle = 30*15 = 450
Area of triangle = 30*15/2 = 225

Add the Area of rectangle and the Area of triangle you will get 675