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三角形外心
Author:
Chang Hui Fang
GeoGebra
New Resources
【案例】2018年全国1卷理科12题
兩位數除以一位數（一）
拼砌四邊形
異分母分數減法
柱體建築師
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斜率
Multiplication of Polynomials 1(多項式的乘法 1)
P4面積
三節棍
Properties of parallelogram(平行四邊形的性質)
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Root
Bar Chart or Bar Graph
Real Numbers
Pyramid
Surface