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斜率乘积为定值(椭圆、双曲线)
Author:
蔡永志
Topic:
Ellipse
,
Hyperbola
斜率乘积为定值
GeoGebra
GeoGebra
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兩位數加法
錐體建築師
算柱 (兩位數)
兩組對邊相等和有直角的四邊形
拼砌四邊形
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量度活動所用的時間 (時、分)
單一族群的競爭理論
圓,圓柱,圓錐,球
加減併式與估算
對稱圖
更相减损术几何表示
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Sine
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