.Juan 16:21La mujer cuandoda a luz, tiene dolor, porque ha llegado suHORA; pero después queha dado a luz un niño, ya no se acuerda de la angustia, por el gozo de que haya nacido un hombre en el mundo.
A regular square pyramid is determined by its medial right triangle, whose edges are the pyramid's apothem (a), semi-base (b), and height (h); the face inclination angle is also marked. Mathematical proportions b:h:a of and and are of particular interest in relation to Egyptian pyramids.