- Coordinate GeometryCoordinates of a pointDistance: vertical & horisontalDistance (length of segment)Distance formulaMidpoint of a line segmentMidpoint formulaSlope of a lineSlope formulaA point on a lineEquation of a line: y-interceptEquation of a line: two pointsAngle of inclinationSlopes: parallel & perpendicular linesEquation of a circle: (0, 0) as centreTangent to a circle