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三角形的四心－五線－內外二圓
Author:
Ho-Kai Chen
四心：內外重垂
GeoGebra
New Resources
三位數除以一位數（一）
兩組對邊相等和有直角的四邊形
找出對稱軸
兩位數加法
兩組對邊相等的四邊形
Discover Resources
堆垛六顆鬼東西
Hyperbolic Paraboloid 的製作
約分BB
ghk106a11 三角形面積比
S3 WS4.3 Q05(3D圖)
Discover Topics
Logarithmic Functions
Polygons
Quadrilaterals
Tangent Function
Logarithm