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Learn more about coordinate geometry.
Geometry with coordinates
Equation of a straight line
Parallel lines
Perpendicular lines
The graphs of y=kx^n
Translation of functions
Reflection of functions
Stretching functions
General transformation of functions
Equation of a circle 1 - Centre (0,0)
Equation of a circle 2 - Centre not (0,0)
Equation of a circle 3
Diameter of a circle
Tangent and normal to a circle
Touching circles
Prove that a line is a tangent to a circle
Khan Academy
Coordinate Geometry of the Line
Coordinate Geometry extended
Angles between intersecting lines
Equation of a circle
