A decorative monument is built in the shape of a pyramid with a square base ABCDABCDABCD.
AB=6 mAB = 6 \text{ m}AB=6 m
The apex E E\,E is 15 m vertically above the base.

Calculate the size of angle EACEACEAC. Give your answer correct to 1 decimal place.
Practise OCR GCSE Maths 3d Pythagoras and Trigonometry with exam-style questions for Foundation and Higher tier. 28 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers 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.