# 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)

×