The diagram shows a pyramid. The base of the pyramid ABCD ABCD\,ABCD is a square.
AB=5 cmAB = 5 \text{ cm}AB=5 cm
The point E E\,E is 10 cm vertically above the base.

Calculate the size of angle EACEACEAC.
Practise Edexcel GCSE Maths 3d Pythagoras and Trigonometry with exam-style questions for Foundation and Higher tier. 28 questions, matched to the Edexcel GCSE Maths (1MA1) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.