Finding line segment length between two fartherst corners of a cube.

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SUMMARY

The problem involves calculating the length of the main diagonal of a cube with a volume of 8. The side length of the cube is determined to be 2, leading to the conclusion that the main diagonal can be calculated using the Pythagorean theorem. By first finding the diagonal of the cube's base and then applying the theorem, the length of the main diagonal is established as approximately 2.83 units. This solution effectively utilizes geometric principles to derive the required length.

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  • Basic algebra for calculating cube dimensions
  • Knowledge of spatial relationships in three dimensions
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Homework Statement



The volume of a cube is 8, how long is its main diagonal (the line segment joining the two farthest corners)?

Homework Equations



Pythagorean theorem


The Attempt at a Solution



I have no idea how to determine the length of the line segment between the two farthest corners of a cube. I've never confronted a problem of this sort.

Once I learn how to determine that line segment, I'll be able to solve the rest of the problem using Pythagorean Theorem.
 
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LearninDaMath said:

Homework Statement



The volume of a cube is 8, how long is its main diagonal (the line segment joining the two farthest corners)?

Homework Equations



Pythagorean theorem


The Attempt at a Solution



I have no idea how to determine the length of the line segment between the two farthest corners of a cube. I've never confronted a problem of this sort.

Once I learn how to determine that line segment, I'll be able to solve the rest of the problem using Pythagorean Theorem.
Find the length of a diagonal on the base. That diagonal will be the base of a triangle whose hypotenuse is the length you want.
 

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