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垂足三角形
Author:
孟宝兴
垂足三角形
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
兩組對邊相等的四邊形
四邊形的特性
三位數除以一位數（一）
找出對稱軸
Discover Resources
弧度制的意义
勾股定理
與兩圓相切之圓心雙曲線軌跡
Copy of fluid mechanics
半椭圆面积的定积分动态演示.许兴华数学
Discover Topics
Right Triangles
Trapezoid
Hypothesis Testing
Hyperbola
Plane Figures or Shapes