A blog about teaching and learning in a maths classroom.

Wednesday, 15 April 2009 | 1 Comment

I need to learn to use GeoGebra because it looks like a fantastic app, it’s free and shortly our students will have their own netbooks, itching to use them. I find the best way to learn new software is to do something with it that you need.

With Year 8, we’ll soon look at the Circle, starting with parts of the circle. I would normally do a matching activity – given names and definitions, students match those to a diagram. I will still do that, but want to also **show** them these parts and how they are different to each other – hence GeoGebra.

I’ve put together an interactive GeoGebra widget, Parts of a Circle. To use it, just turn on/off the various parts. Also make sure you move some of the points to see how a part changes, e.g. sectors can be big or small or a quadrant always has an angle of 90°.

If you want to use this in class, as is, this version has the widget on a black background with nothing else. Or, you might want to modify the GeoGebra file and make your own version.

Parts of a Circle - GeoGebra
GGB, 4 KB

This work is licensed under a Creative Commons License (?).

Posted in • Lesson Idea • Circles • Software • GeoGebra • Technology • IWB • Projector Resource | Short URL: http://mths.co/1466

New Subscribe to the …

MathsLinksemail newsletter

**Simon Job** — eleventh year of teaching maths in a public high school in Western Sydney, Australia.

**MathsClass** is about teaching and learning in a maths classroom. more→

@simonjob

updates via @mathslinks

BETWEEN 2 NUMBERS - 1-10

mathsAre you pronouncing 'kilometre' correctly? - RN - ABC News (Australian Broadcasting Corporation)

mathsBut what is the Fourier Transform? A visual introduction. - YouTube

video fourier mathsSarah Carter on Twitter: "Spent some time Americanizing this resource from @MathsPadNicola. Already paid off in an awesome way. A student came to get today's work bec… https://t.co/TqzI6sbA8A"

maths graphing straight-line-graphsKent Haines on Twitter: "Here are some ways to represent 2x+3 = 17. Any others you can think of? #msmathchat #mtbos https://t.co/XQF2uW2sdq"

maths equations

## Comments