XXX, Y Y\,Y and Z Z\,Z are points on the circumference of a circle, centre OOO. WY WY\,WY and WZ WZ\,WZ are tangents to the circle from an external point WWW.
Angle OWZ=19∘OWZ = 19^\circOWZ=19∘
Find the size of angle YXZYXZYXZ.
Give reasons for each stage of your working.
Practise Edexcel GCSE Maths Circle Theorems with exam-style questions for Foundation and Higher tier. 72 questions, matched to the Edexcel GCSE Maths (1MA1) specification and written in Paper 1, Paper 2 and Paper 3 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.