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Polygonal Number 多邊形數
Author:
Alex CHIK
GeoGebra
GeoGebra 互動數學教室
http://www.geogebra.hk
New Resources
Reflection across a line
Triangle with 3 Right Angles
Shells
Exploring GeoGebra for the First Time
Reflection Across 2 Parallel Lines
Discover Resources
fractales
Horizontal Stretch
Ratio of Squares visual proof
การบวกจำนวนเต็ม
MS.7.1.3
Discover Topics
Sphere
Logic
Kite
Straight Lines
Optimization Problems