The diagram shows triangle ABCABCABC.

ADB ADB\,ADB is a straight line.
the size of angle BCDBCDBCD : the size of angle ACD=2:3ACD = 2 : 3ACD=2:3
Work out the size of angle ADCADCADC.
Practise OCR GCSE Maths Ratio with exam-style questions for Foundation and Higher tier. 93 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.