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วงกลมแนบนอก
Author:
Kowit Prakopphon
GeoGebra
New Resources
Simplifying Radicals: Geometric Thin Slice
Ellipse, Hyperbola and Circle as Envelopes
Isosceles Triangle: Quick Construction
Bottema's Theorem
Rotating Points (Optical Illusion)
Discover Resources
Special Quadrilaterals
urok 49
Centroid:Orthocenter
bull in Pipe
MVP 7.1 on Computers