Pure Mathematics 2 Formulas Flashcards
1
Q
Midpoint of a line
A
((x1+x2)/2) , ((y1+y2)/2)
2
Q
Perpendicular bisector
A
gradient = -1/gradient of other line
3
Q
Equation of a circle
A
(x-a)^2 + (y-b)^2 = r^2
4
Q
Does a line intersect with a circle?
A
Use discriminant to find
5
Q
How to find equation of a circle?
A
Use all information (e.g. midpoint/radius etc) and complete the square
6
Q
How is a point found to be on a circle?
A
Point is put into equation and equals correct radius
7
Q
How to determine centre of a circle?
A
Half diameter and always bisects a chord
