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Angles in the Circumference and the Centre
Author:
Lam Kam Hung
Topic:
Quadrilaterals
Angles at the Circumference
GeoGebra
New Resources
柱體建築師
兩組對邊相等的四邊形
找出對稱軸
四邊形的特性
畫出對稱圖形
Discover Resources
过定点且与直线相切的圆
標準差：測驗
雜類(Miscellaneous)
General Form of Quadratic Functions 二次函數的圖像：一般式
公切線的引入
剪切成正三棱柱（制作：李三军，修订：孟宝兴）
Discover Topics
Natural Numbers
Rhombus
Confidence Interval
Diagrams
Scatter Plot