If $O$ is any point inside a rectangle $PQRS$, then $O{P}^2+O{R}^2=O{Q}^2+O{S}^2$

In a right-angled triangle, the _____ of the Hypotenuse is equal to the sum of the squares of the other two sides.

If a line divides two sides of the triangle in the _____ ratio, the line is parallel to the third side.