The Distance Formula
Learn how to derive and apply the distance formula to calculate the straight-line distance between any two points on the Cartesian plane.
About This Topic
Learn how to derive and apply the distance formula to calculate the straight-line distance between any two points on the Cartesian plane.
Key Questions
- Explain how the Pythagoras theorem is used to derive the distance formula.
- Analyse the effect on the distance calculation if the order of the points (x1, y1) and (x2, y2) is swapped.
- Justify why the distance between two points is always a non-negative value.
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