# 3D geometry on radial coordinates?

**Geometry**Level pending

All angles are defined in degrees.

We represent points as ( r, \(\theta_1\), \(\theta_2\)).

r stands for the distance of the point away from the origin.

\(\theta_1\) stands for the horizontal angle away from the horizontal line going east from the origin, going clockwise. \(0 \leq \theta_1 \leq 360\).

\(\theta_2\) stands for the vertical angle away from the horizontal line going east from the origin, going anti-clockwise. \(0 \leq \theta_2 \leq 360\).

An example of what this means is that (4, 60, 30) translates to (3, \( \sqrt{3}\), 2) in the Cartesian coordinates.

What is the approximate distance of (8,59,70) from (5,3,79)? (to 3 significant figures)

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