Coordinate Geometry Flashcards
(8 cards)
1
Q
Perpendicular lines
A
Gradients product is -1
2
Q
Equation of a circle
A
(x+a)^2 + (y+b)^2 = r^2
3
Q
Circle unknown + K
A
Sub in values
4
Q
Chord:
A
Negative reciprocal is radius
5
Q
2 Chords:
A
Intersection of perpendicular bisector of coords
6
Q
Diameter of circle
A
Whatever triangle will be 90 degrees
7
Q
Prove right angled
A
Use pythag
8
Q
Find equation for tangent
A
Find radius grad
Find tangent grad
Use point P
