This video is all about finding the missing angle in a shape, and is aimed at around grade 5+ GCSE maths.
“P, Q and R are points on a circle, centre O. Angle OPR = 36 degrees. Work out the size of PQR.”
Finding the missing angle in a shape questions appear in all the main examination boards, including Edexcel, AQA and OCR. They are popular and, once you have the basic principles, fairly similar. Please do stop the video, try the question and compare your solution.
- These diagrams are not drawn to scale so, unfortunately, you can’t measure the angle
- This particular question involves circle theorems
- … although you also get angles in parallel lines
- Try to write your reasons, to gain full marks
If you would like to find out more try these questions, aimed at around grade 6, on a non calculator paper. There’s also a few videos that might help:
Please do leave a comment below if you are not sure. Alternately you can view my YouTube channel and leave a comment there – I’ll always try to respond as quickly as possible.