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教学素材：离心率相同的抛物线
Author:
清风拂琴，陌上花开
GeoGebra
New Resources
柱體建築師
兩位數除以一位數（一）
四邊形的特性
兩組對邊相等的四邊形
拼砌四邊形
Discover Resources
Distributive Law of Multiplication 2 (乘法的分配率 2)
方圓面積
螢橋國中 黃奕辰
爱奇艺
圓內接四邊形的圓周角
Discover Topics
Unit Circle
Piecewise Functions
Area
Secant Line or Secant
Special Points