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标题 的副本

Published on Apr 04, 2016

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PRESENTATION OUTLINE

1.

圆

六十九中 李金霖
Photo by Dominic Alves
2.

圆的周长

直径乘兀 rx兀
Photo by Andreas.
3.

圆的面积

半径2x兀
Photo by David Jackmanson
4.

圆有无数条半径

（或直径）
Photo by XcBiker
5.

要记住

看圆的知识点
Photo by Ben Grey
6.

再见

李金霖
Photo by StuartWebster

李进 李

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