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正弦公式(證明)
Author:
Y.W. Liu
Topic:
Sine
GeoGebra
New Resources
球体的体积推导（优化版）
第八周作业
三位數除以一位數（二）
拼砌四邊形
兩位數加法
Discover Resources
形心
Compound Inequalities(複合不等式)
三視圖3d眼鏡
弦心距
椭圆内切圆链
Discover Topics
General Quadrilateral
Similar Triangles
Pie Chart or Circle Chart
Integers
Power Functions