Find the side length of the largest cube which can fit inside a sphere of diameter 24 cm

If the diameter is 24, the radius must be 12
√(3x²) = 12 

3x² = 144 

x² = 48 
. . . . ._ 
x = 4√3 
Each edge of the cube is twice that or 8√ 3 

Hope this helps 

Where’s the graph too show me?