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九點圓 (9-Point Circle)
Author:
羅驥韡 (Pegasus Roe)
九點圓 參考網址：
維基百科
Discover Resources
Playing with Amplitude And Period
The Basement
Luis Kite
Parallel Lines Cut by a Transversal
G-CO.12 Geometric Constructions
New Resources
Midpoints of ANY quadrilateral forms a parallelogram
Moving Dots
Span2D
Linear Transformations-m5 chg2
problem
