Polar coordinates

There are 5 NRICH Mathematical resources connected to Polar coordinates
Polar Bearings
problem

Polar bearings

Age
16 to 18
Challenge level
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What on earth are polar coordinates, and why would you want to use them?
Maltese Cross
problem

Maltese cross

Age
16 to 18
Challenge level
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Sketch the graph of $xy(x^2 - y^2) = x^2 + y^2$ consisting of four curves and a single point at the origin. Convert to polar form. Describe the symmetries of the graph.
Polar Flower
problem

Polar flower

Age
16 to 18
Challenge level
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This polar equation is a quadratic. Plot the graph given by each factor to draw the flower.
Placeholder: several colourful numbers
problem

Bent out of shape

Age
14 to 18
Challenge level
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An introduction to bond angle geometry.
An introduction to polar coordinates
article

An introduction to polar coordinates

This introduction to polar coordinates describes what is an effective way to specify position. This article explains how to convert between polar and cartesian coordinates and also encourages the creation of some attractive curves from some relatively easy equations.