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parabola, b varies, a, c fixed
Author:
perspect
GeoGebra
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兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
兩組對邊相等的四邊形
畫出對稱圖形
四邊形的特性
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王宏銘Proof93
Apollonius Problem 7 CCP Inversion simple
探索金字塔高度
Template: 對稱04
劉徽的「割圓術」的副本
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Median Line
Polynomial Functions
Area
Fractions
Square