Polar Coordinates – Resources

StationeryWith Year 13 I will be looking at Polar Coordinates this week. The first thing we’ll need to do is understand the meaning of polar coordinates and be able to convert from polar to Cartesian coordinates and vice-versa. So we will need some polar graph paper and Desmos! Checking my stationary list I found exactly what I needed on MathBits, scroll down the page for polar papers; one of the options usefully provides 4 smaller grids to one page.

So now to plot some points, Desmos provides a good solution

Desmos - polar coordinates

Select image for Desmos page

With two points to play with, we can understand how negative values of r and θ are displayed and appreciate that a point may be described in more than one way with polar coordinates.

The Desmos page also shows the relationship between polar and Cartesian coordinates (the Cartesian form is needed to plot the points.) On that subject, Desmos created the page below – match up the two points.
Desmos - polar & cartesian coordinates
We also need to be able to plot polar curves, Desmos is ideal for exploring polar curves; it is possible to use sliders to see how the curve is generated as values of θ increase.

desmos-domain-and-sliders

On the AQA website the Teaching and learning resources page for A Level Further Maths includes three online textbooks under the Resources for students heading. The second book (Unit 03) includes a chapter on Polar Coordinates.

WolframAlpha can also be used for polar plots.

For further examples and resources, see this post on Mathematics for students.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s