Co-ordinate geometry

This topic is examined on Paper 2 question 2 and 3.
Question 2 is co-ordinate geometry of the line only - this is mainly the same as Junior Cert Higher Level co-ordinate geometry, with the addition of finding the area of a triangle.
Question 3 is co-ordinate geometry of the circle.
Once you remember that the equation of a circle with centre (h,k) is

(x-h)² + (y-k)² = r²

and some basic rules about tangents to circles there is not a lot of extra work required for this question.

Here is a 1-page overview.