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旋轉一物件
Author:
shihfeng
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
拼砌四邊形
三位數除以一位數（二）
【案例】2018年全国1卷理科12题
兩組對邊相等的四邊形
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rectangular
qid_39321
工具：PlaneArrows, PlaneText... (v.2)
雙曲線2-交點法
椭圆内部全等的双椭圆构造.许兴华数学
Discover Topics
Symmetry
Orthocenter
Addition
Subtraction
Conic Sections