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平行線的截線性質
Author:
Gideon Huang
拖曳直線上的點,當兩條平行線被一直線所截時, 觀察各組同位角、內錯角、同側內角的度數變化。
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算柱 (兩位數)
四邉形 (四年級) 教師版
判斷球體
球體建築師
找出對稱軸
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研習講義
PMC 2014-15 ans
圖形的周界
重心
数学涂鸦
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Intersection
Geometry
Straight Lines
Statistics
Isosceles Triangles