Area and Volume Review

The area of a figure is the number of square units it takes to completely fill a space or surface. The area is measured in square units. Recall that the area of a parallelogram is base x height.

If you divide a parallelogram into two congruent triangles, the area of each triangle is ½ x base x height.

A trapezoid can be divided into a rectangle and two triangles. The area of a trapezoid is the sum of the areas of the rectangle and the triangles.

You can find the area of irregular polygons by decomposing the polygon into rectangles, triangles, and other shapes.

Volume is the number of cubic units needed to fill a space. Volume is measured in cubic units. The volume of a prism is found by multiplying the area of the base times the height.

The surface area of a three-dimensional figure is the sum of the areas of its surfaces.

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