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Orthocentre

Author:Big Lee

New Resources

畫出對稱圖形
三位數除以一位數（二）
拼砌四邊形
兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）

Discover Resources

雙曲線
Li Shan Lan Cone Logarithm
拋物線
三角函數的繪圖1
二面角的副本

Discover Topics

Vectors
Tree Diagrams
Congruence
Calculus
Expected Value

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