Homework Help: Geometry

Posted by Cara on Thursday, January 14, 2010 at 11:50pm.

What is the formula for finding the surface area of a right rectangular prism? (ex: The base of a right rectangular prism is 10 ft by 7 ft. The height is 3 ft. Find the surface area)

Geometry - drwls, Friday, January 15, 2010 at 12:13am
The total surface area of a rectangular prism is
2(ab + ac + bc)
where a, b and c are the three side lengths.

It would be 2(70 + 30 + 21) = 242 ft^2 for the figure you describe.

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