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半椭圆面积的定积分动态演示.许兴华数学
Author:
许兴华数学
Topic:
Definite Integral
,
Upper and Lower Sum or Riemann Sum
GeoGebra
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兩組對邊相等的四邊形
兩位數加法
画直线等分三角形的面积
兩組對邊相等和有直角的四邊形
球體建築師
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拋物線
分數乘法
龜甲
tan(x) = x
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