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Suppose Marco draws a cross-section of the cube shown below and the result is a triangle. Describe how Marco could have sliced the cube to produce a triangular cross-section.
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Suppose Marco draws a cross-section of the cube shown below and the result is a triangle. Describe how Marco could have sliced the cube to produce a triangular cross-section.

Suppose Marco draws a cross-section of the cube shown below and the result is a triangle-example-1
User Absynce
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If he slices the cube so that the smaller piece only includes one of the original corners the cross section will be a triangle.

The biggest triangle he can get is by cutting along the diagonals of the three visible faces.
User Proustibat
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