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GeoGebra

Round in Circles

作者:Linda Forrester, Tim Brzezinski
主题:圆

Circles, circumference and area

Watch the video. Then find the Area and Circumference of the following circles.
The radius is 5m.
The Radius of this circle is 3cm.
this circle has a diameter of 4cm
this circle has a diameter of 16m.

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