Please help.. which side is greatest.

Consider a cube that has sides of length l. now consider putting the largest sphere you can inside this cube without any point on the sphere lying outside of the cube. the volume ratio -volume of the sphere/ volume of the cube is 1. 5.2 × 10−1 2. 3.8 × 10−1 3. 1.9 4. 2.5 × 10−1 5. 3.8

What is always true when two whole numbers are subtracted?

If you prove that ∆wxz is congruent to ∆yzx, which general statement best describes what you have proved?