This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Mathematical Pyramid. Regular square pyramid showing the median triangle with apothem semibase height and inclination angle en Dicklyon en Dicklyon Original upload log en MathematicalPyramid svg Dicklyon bytes no pyramid little taller tighter framing showing right angle Dicklyon bytes no square pyramid showing the