A, B, C and D are points on a circle. PCQ is a tangent to the circle.
AB = CB.
Angle BCQ = xº
Prove that angle CDA = 2xº
Give reasons for each stage in your working.

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.

there is no picture in order for this question to be answered

english maybe i can ..