In polar coordinates (r, θ), what formula is used to calculate the radius r from Cartesian coordinates (x, y)?
Show answer
r = √(x² + y²)
The radius r represents the distance from the origin to the point (x, y). This relationship is derived directly from the Pythagorean theorem.
Also asked as:
- In the polar coordinate system, how is the distance from the origin (r) expressed in terms of Cartesian x and y?