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Wikijunior
:
形狀/基本形狀/三角形
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由 Wikibooks 提供，開放世界，開放書籍
<
Wikijunior:Shapes
|
基本形狀
這是
最近審查的版本
，
檢查
於
2011 年 4 月 27 日
.
三角形具有3個邊
類別
:
書籍：Wikijunior：形狀
華夏公益教科書
