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TRIANGLE
Author:
Tina Lin
GeoGebra
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四邉形 (四年級) 教師版
兩組對邊相等的四邊形
球体的体积推导
【案例】2013年安徽高考15题
拼砌四邊形
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test1
分段移動
上課
椭圆的定义
动点最值问题&抛物线模型
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Confidence Interval
Sine
Angles
Equilateral Triangles
Ratios