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3)Area of triangle 0.5absinC with 2 different angles
Author:
Pong Hai Lin
GeoGebra
New Resources
找出對稱軸
四邊形的特性
球體建築師
第八周作业
拼砌四邊形
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GeoGebraBook(for20151202)
Homework2
Geometric Meaning of Derivatives
不规则平移
圓周角與圓心角之度數關係臆測（圓心在圓周角的外部）
Discover Topics
Correlation
Linear Equations
Equations
Circle
Equilateral Triangles