The hypocenter is the point within the earth<span> where an earthquake rupture starts. The epicenter is the point directly above it at the surface of </span>the Earth<span>.</span>
One is a grandfather, one is a father, and the other is a son. Two fathers and two sons, but only 3 people since the father is both a dad and a son.
Rectangle has two axes of symmetry (see attached diagram). So an arbitrary rectangle can be reflected across two axis of symmetry so that it carries onto itself