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光圈与正多边形外角和
Author:
赵林
Topic:
Polygons
GeoGebra
New Resources
四邊形的特性
判斷球體
算柱 (兩位數)
三位數除以一位數（一）
【案例】2018年全国1卷理科12题
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some pic
convolution_demo1
加法
貸款
配方法圖解
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LCM and GCD
Linear Equations
Means
Kite
Sphere