The “unsolvable problem” the parent refers to is the problem of geometrically constructing a square with the same area as a circle. It has been proven to be imp

The “unsolvable problem” the parent refers to is the problem of geometrically constructing a square with the same area as a circle. It has been proven to be impossible. https://en.m.wikipedia.org/wiki/Squaring_the_circle https://en.m.wikipedia.org/wiki/Squaring_the_circle