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平行線法
Author:
chen mingchuan
GeoGebra
New Resources
拼砌四邊形
【案例】圆柱体内放置一个大球六个小球
画直线等分三角形的面积
算柱 (兩位數)
兩位數除以一位數（二）
Discover Resources
四邊形四個九點圓共點
Locus: Equidistance From Two Parallel Lines
例子
fixed arc length and fixed shaded area
Euler Line 1
Discover Topics
Upper and Lower Sum or Riemann Sum
Integers
Reflection
Circle
Subtraction