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Area of Triangle
Author:
Miss Tsui
,
Anthony OR 柯志明
Area of Triangle
GeoGebra
New Resources
算柱 (兩位數)
兩組對邊相等的四邊形
四邉形 (四年級) 教師版
判斷球體
三位數除以一位數（一）
Discover Resources
圓面積計算
優良作品5
橢圓1--同心圓法
時距計算機 (時針改變)
已知長方形周界和長求闊
Discover Topics
Arithmetic Operations
Square
Circle
Geometry
Interest Calculation