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直角三角形斜邊上的高
Author:
Gideon Huang
GeoGebra
New Resources
三位數除以一位數（一）
算柱 (兩位數)
畫出對稱圖形
直角坐標平面上的旋轉變換
兩組對邊相等和有直角的四邊形
Discover Resources
Task 7: Visualize the Theorem of Thales
GGB基礎教學Reuleaux
圓柱體的體積及總表面面積
路旁的树
动圆与两圆外切与内切(1)
Discover Topics
Line Segment
Distributions
Arithmetic Operations
Median Value
Secant Line or Secant