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合 24（附答案）
Author:
Anthony OR 柯志明
GeoGebra
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兩組對邊相等的四邊形
異分母分數減法
拼砌四邊形
四邊形的特性
球体的体积推导
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下和
廣義三角函數
测试问题
以 Unit Circle 了解 Sine 的正/負的副本
中考数学16讲
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Cuboid
Definite Integral
Angles
General Quadrilateral
Similar Triangles