In this vector lesson, we’ll look at perpendicular distance between a point and a line or plane.

## Perpendicular distance between a point and a line

To find the distance between a point, we first need to find a point on the line e.g. A. Once A is found, find vector AP, and the perpendicular distance from P to the line is taken to be :

where **b** is the direction vector of line l, (or any vector that is parallel to the line l).

## Perpendicular distance between a point and a plane.

To find the perpendicular distance between a point and a plane, we first need to find a point on the plane e.g. A. Once A is found, find vector AP, and the perpendicular distance from P to the plane is taken to be :

## Notes on H2 Math Vectors

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## All the notes for H2 A Level Math

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