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旁心小結論
Author:
黃國斌
GeoGebra
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兩組對邊相等的四邊形
兩位數除以一位數（二）
判斷球體
【案例】2018年全国1卷理科12题
拼砌四邊形
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日照杆影演示
GGB3
anlge at centre twice angle at circumference
一數的百分之幾是多少？
三角函数定积分的动态演示.许兴华数学
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Sphere
Definite Integral
Expected Value
Similar Triangles
Percentages