This video is all about finding the missing angle in a regular polygon, and is aimed at around grade 5 GCSE maths.
These types of 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.
PQ, QR & RS are 3 sides of a regular decagon. PRT is a straight line. Angle TRS = x degrees. Work out the value of x.
I hope the video helps and please do leave a comment – thanks!
Watch on YouTube
Finding the missing angle in a regular polygon – quick test question 1
I hope it becomes a little clearer as you work through the quick test videos, before moving on to the higher levels. They do take a bit of a leap forward, although should be OK if you have viewed the earlier ones.
If you would like to find out more try these:
Finding a missing angle; GCSE Mathematics Quick Test
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.