P1 Coordinate Geometry Flashcards
(7 cards)
1
Q
Formula for a straight line:
A
π¦ - π¦β = m(π₯ - π₯β)
2
Q
Formula for gradient:
A
π¦β - π¦β / π₯β - π₯β
3
Q
Formula for midpoint:
A
((π₯β - π₯β) / 2, (π¦β - π¦β) / 2)
4
Q
Formula for distence
A
sqr( (π₯β - π₯β)Β² + (π¦β - π¦β)Β² )
5
Q
Fact for parallel lines
A
The gradients are the same
6
Q
Fact for perpenciular
A
The gradients times together to equal -1
7
Q
Gradient for perpendicular bisectors
A
The gradient is the negative reciprocal of the original lines gradient
