In this lesson Rob travels to Egypt where he will teach you how to calculate angles inside the great Pyramid of Giza. Rob also uses real 3D models to help you visualise the 2D triangles inside the pyramid that you will need in order to solve these 3D problems.

You must be able to calculate angles using Trigonometry before trying this lesson. If not then watch the following lessons: Finding an angle.

The question that is covered in this lesson is, Calculate the angle AEC inside the great pyramid of Egypt.
The pyramid has a square base.
AE=BE=CE=DE=186m