4 right triangular pyramids make a cube now instead of a cube suppose there's a square prism
4 times volume of triangular pyramids should be equal to the volume of square prism
(4bh)/3 = a^2 * h
but since its a square at the base, let us suppose that 2ar(triangle at base) = area of square
(2*a^2h)/3=a^2 * h
which gives 2/3=1
which should mean that a cube is not made of 4 pyramids
but we know that is not true
how?