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Bearings(方位)
Author:
chisunch1
GeoGebra
New Resources
拼砌四邊形
三位數除以一位數（一）
兩組對邊相等的四邊形
兩組對邊相等和有直角的四邊形
【案例】2018年全国1卷理科12题
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test
Rectangle Prism
Light reflected in ellipse
多邊形的切割與拼砌的副本
动圆与两圆外切与内切(2)
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Statistics
Sine
Hyperbola
Root
Circumcircle or Circumscribed Circle