# Thread: coordinate geometry

1. ## coordinate geometry

P(-2,-6), Q(6,9) and R(1, -3) are the vertices of a triangle. Find the number of units by which the length of PQ exceeds the length of QR.

Please I need your help. ^ Thanks.
time: 4h.

2. So use Pythagoras to find the length PQ, the length QR, and see how much longer it is...

3. it was more simple than I thought xD thanks