Circles - Finding area and circumference

The circumference and area of a circle can be found if the radius or diameter are known.

 

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How Many Sides?

How Many Sides?

How many different polygons can you make on a 3 by 3 pin board? What about larger pin boards? So far this activity has been accessed 7003 times and it is ready for you to enjoy!

Teacher: Click the play button in the centre of the video screen above. In the bottom right corner of the video (when you cursor moves over the playing video) is a broken square button which opens full-screen mode.

Circles - Finding area and circumference

The circumference and area of a circle can be found if the radius or diameter are known.

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