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Perimeter
Author:
Ting Chui Yee
,
Anthony OR 柯志明
,
Angela Yan
GeoGebra
New Resources
拼砌四邊形
找出對稱軸
算柱 (兩位數)
四邉形 (四年級) 教師版
美國國旗 (Codex 版)
Discover Resources
三角形內切三圓
test file
立方和
橢圓
正多邊形各邊中點連線所圍成的圖形
Discover Topics
Numbers
Conic Sections
Rhombus
Cosine
Ellipse