A sunken ‘pyramid’ located near Taiwan has researchers rethinking everything they know about ancient civilizations.

Each side of the Great Pyramid rises at an angle of 51.5 degrees to the top. Not only that, each of the sides are aligned almost exactly with true north, south, east, and west. For a pyramid to ...

frac{1}{3} \times \text{area of base} \times \text{perpendicular height}\) The perpendicular height, (h), is the height of the pyramid measured at a right angle from the base.