PTQ is a tangent to the circle.
R, S and T are points on the circle.
Write down the size of angle y
Give a reason for your answer.
![PTQ is a tangent to the circle R S and T are points on the circle Write down the size of angle y Give a reason for your answer class=](https://us-static.z-dn.net/files/d3e/39a35143e6982e8d0124c889a88f0d12.png)