## Introduction to Three-dimensional Geometry

# Distance between Two Points

- Distance between two points P(x, y, z) and Q (x
_{2}y_{2}z_{2}) is given by PQ = \tt \sqrt{(x_{2}-x_{1})^{2}+(y_{2}-y_{1})^{2}+(z_{2}-z_{1})^{2}}

### View the Topic in this video From 09:10 To 12:58

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1. Let P(x_{1}, y_{1}, z_{1}) and Q (x_{2}, y_{2}, z_{2}) be two given points. The distance between these points is given by

PQ = \sqrt{(x_{2}-x_{1})^{2}+(y_{2}-y_{1})^{2}+(z_{2}-z_{1})^{2}}

2. The distance of a point P(x, y, z) from origin O is

OP=\sqrt{x^{2}+y^{2}+z^{2}}