DDD, E E\,E and F F\,F are points on the circumference of a circle, centre OOO. DE DE\,DE is a diameter.
Angle FDE=(4x+10)∘FDE = (4x + 10)^\circFDE=(4x+10)∘ Angle DEF=x∘DEF = x^\circDEF=x∘
Find the value of xxx.
You must show all your working.
Practise OCR GCSE Maths Circle Theorems with exam-style questions for Foundation and Higher tier. 72 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.