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Formulae & Quick Help for Coordinate Geometry |
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Distance formula |
Midpoint = |
Area of Triangle |
Slope of line = m
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| Finding the slope of a line from the
equation Y = MX + C |
All parallel lines have same slope |
| To find a perpendicular slope you must flip and change sign eg 1/2 would have a perpendicular slope of -2/1. | To verify lines are perpendicular multiply their slopes together and you should get -1 i.e. m1* m2 = -1 |
| Equation of a line when you have slope and a point y - y1= m(x - x1) | |
