To find the area of a rectangle, you multiply the length by the width. In this case, the length is 7 cm and the width is 4 cm. Therefore, the area of the rectangle is 7 cm x 4 cm = 28 square cm.
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It is: 4*2 = 8 square cm
Area = 10*4 = 40 square cm
It is 3 cm high.
the volume is 192 sq cm
The area of a right triangle that has legs 7 cm and 4 cm long can be calculated using the fact that a right triangle is half of a rectangle. The area of a rectangle is l*h, so the area of a right triangle is l*h/2. In this case, the area is 14 cm^2.