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元旦快乐（制作：孟宝兴）
Author:
孟宝兴
GeoGebra
New Resources
【案例】2018年全国1卷理科12题
三位數除以一位數（一）
判斷球體
兩組對邊相等的四邊形
兩組對邊相等和有直角的四邊形
Discover Resources
fold and unflod the cone with geogebra5.0
兩圓內外公切線
三垂線定理
橢圓代數性質,光學性質,生活應用
S5R1L4圆内迭代反射——朱老师
Discover Topics
Mathematics
Matrices
Bar Chart or Bar Graph
Secant Line or Secant
Isosceles Triangles