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GeoGebra
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Scheimpflug Principles 1 and 2, Thin Lens
Author:
optowiki.info (Michael Schaefer)
GeoGebra
New Resources
cylinder net slider
Isosceles Triangle: Quick Construction
"Compressed" Astroid as Envelope
History of Maths
Piano. Keyboard.
Discover Resources
Fun with math and science
new tool
SPH3UB/SPH3UC Varying Angle and Vector Sizes
H Farhana Enlargement
三角函数图象
Discover Topics
Boxplot
Mode
Polygons
Natural Numbers
Linear Regression