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九點圓 (9-Point Circle)
Author:
羅驥韡 (Pegasus Roe)
Topic:
Circle
九點圓 參考網址：
維基百科
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
三位數除以一位數（一）
異分母分數減法
球體建築師
球体的体积推导（优化版）
Discover Resources
My first Geogebra Book
JavaScript to Create Slider
箭头平移动画
橢圓1--同心圓法
加法与乘法
Discover Topics
Polygons
Natural Numbers
Line Segment
Bar Chart or Bar Graph
Rational Numbers