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Heron's Formula 希羅公式
Author:
Alex CHIK
GeoGebra
GeoGebra 互動數學教室
http://www.geogebra.hk
New Resources
Viviani's Window
"Compressed" Astroid as Envelope
van Aubel's Theorem
Stairs (Optical Illusion)
Isosceles Triangle: Quick Construction
Discover Resources
Pythagorean Triples
Area of Circles
Kéttagú összeg négyzete
Rotation of Triangle
Untitled
Discover Topics
Similarity Transformation or Similarity
Probability
Vectors
Straight Lines
Hypergeometric Distribution