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同心圓+等分割線
Author:
許清惟
GeoGebra
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兩組對邊相等和有直角的四邊形
GeoGebra笔记功能体验课件
三位數除以一位數（二）
兩組對邊相等的四邊形
【案例】2018年全国1卷理科12题
Discover Resources
商高定理之新月形
Fundamental theorem of curves
畢式定理 (04)
perimeter
截平面
Discover Topics
Congruence
Multiplication
Trapezium
Indefinite Integral
Trigonometry