Shana J.

asked • 02/17/19

7th grade Math homework help

Jackson paints a cube. After the paint dries he cuts the cube in half. He makes a cut along the diagonal of one pair of parallel faces. Round to the nearest thousandth, the diagonal has a length of 7.071 centimeters. Once the cut is made, jackson has two identical triangular prisms. First is the combined area, in square centimeters, of the surfaces of the two prisms that were not painted? Show your work.

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Mark M. answered • 02/17/19

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s represents the length (edge) of the cube.

7.071 = s√2

5 = s (to the nearest thousandth)


What kind of figure are the unpainted surfaces?



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Shana J.

I wanna say a rectangle
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02/18/19

Shana J.

Im just guessing If we cut it in half the bottom of the shape wouldn't be painted
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02/18/19

Mark M.

Can you find something that is a cube? Draw a line on the diagonal of one face? Does that clarify?
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02/18/19

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