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練習－由一元二次方程判別根的數目
Author:
Lau Sir
GeoGebra
New Resources
球体的体积推导
第八周作业
【案例】圆柱体内放置一个大球六个小球
柱體建築師
兩位數除以一位數（二）
Discover Resources
由拉線80209傅筱茿螢橋國中
ghseh 二次函數動畫上下平移
Gazing Cow Problem (b)
劉徽的「割圓術」的副本
兩位數除兩位數(例子一)
Discover Topics
Trapezoid
Integral Calculus
Cosine
Rhombus
Pythagoras or Pythagorean Theorem