po-lar co-ord-in-ates
/ˈpōlər kōˈôrdəˌnāts/
Points in a plane using a distance from a fixed point (the north or south pole) and an angle from a fixed direction (the polar axis). They are written as (r, θ), where 'r' is the radius (distance from the pole) and 'θ' is the angle (often in radians) from the polar axis, according to Pearson.
Polar coordinates (r, θ) can be converted to Cartesian coordinates (x, y) using the formulas: x = r cos θ and y = r sin θ.
Source: Cindy Mc Kean