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Angle in alternate segment
Author:
johnmayhk
GeoGebra
New Resources
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
兩組對邊相等的四邊形
三位數除以一位數（一）
三位數除以一位數（二）
Discover Resources
測試1
餘弦定理
動畫
Rotation: Rolling Motion的副本
角谷猜想
Discover Topics
Arithmetic Operations
Reflection
Correlation
Subtraction
Orthocenter