One last day on co-ordinate geometry

In the last class before the break, we did a co-ordinate geometry test - with a Q2 and Q3 type question.
Most people did well on Q2 (co-ordinate geometry of the line) but not well on Q3 (co-ordinate geometry of the circle).

It is worth putting more work into this topic, especially the co-ordinate geometry of the circle as all you need to remember is

• the formula of a circle (x-h)² + (y-k)² = r²
• all the co-ordinate geometry of the line you know so well anyway for Q2
• the relationship between radius, diameter, tangents etc that you learned in Junior Cert
• the intersection of a line and circle which you need to know anyway as it can come up in the algebra section of Paper 1.

We'll do a class covering overall approach to co-ordinate geometry on Monday, then move on.

Don't forget that you are supposed to be attempting Leaving Cert 2003 over the Easter break.