The diagram shows a wooden doorstop in the shape of a triangular prism.
CD=12 cmCD = 12 \text{ cm}CD=12 cm
AD=20 cmAD = 20 \text{ cm}AD=20 cm
Angle FDC=40∘FDC = 40^\circFDC=40∘
Calculate the size of the angle the line AF AF\,AF makes with the plane ABCDABCDABCD.
Give your answer correct to 3 significant figures.
3d Pythagoras and Trigonometry Questions
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.