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凹透鏡 Concave Lens
Author:
Alex CHIK
Drag the grey/ red points to change positions of the object. Drag the black point to change source of light.
GeoGebra
GeoGebra 互動數學教室
http://www.geogebra.hk
New Resources
Dodecahedron
Icosahedron
Poorly Drawn Parallelograms 3
alg2_05_05_01_slider_practice_flvs
Poorly Drawn Parallelograms
Discover Resources
Parallels to the Brocard Triangle
Graphing Exponential Functions
semester project fun with quadrilaterals
Reflecting a point about a line
Kopi av Light Mixing
Discover Topics
Differential Calculus
Parabola
Sphere
Subtraction
Random Variables