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Home > PC > Chapter 8 > Lesson 8.1.3 > Problem 8-45

8-45.

S = 6L2

Draw a triangle within the cube with the longest diagonal D.

Find the diagonal of the bottom square AC.

Solve for L in your equation from part (a) above. Then substitute that expression for L in your D equation.

Use the eTool below to solve this problem.
Click the link at right for the full version of the eTool: PCT 8-45 HW eTool