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證平行四邊形 (對角線互相平分) (對邊 // 且相等)
Author:
W.L. Wong, Albert
GeoGebra
New Resources
美國國旗 (Codex 版)
兩組對邊相等的四邊形
Nested spiral octagon
sanjiaohanshu
兩組對邊相等和有直角的四邊形
Discover Resources
chuan-eBook
Statistics (M1)
中国GeoGebra用户认证说明
整數除真分數
工作紙-真分數乘以真分數
Discover Topics
Similar Triangles
Mode
Circumcircle or Circumscribed Circle
Rectangle
Linear Programming or Linear Optimization