x is the projection of c, and in a right pyramid (i.e. symmetric, with a regular polygon base), the projections of its edges on the base plane are also bisectors of the base's angles.

## x is the projection of c, and

x is the projection of c, and in a right pyramid (i.e. symmetric, with a regular polygon base), the projections of its edges on the base plane are also bisectors of the base's angles.