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path of minimum time; Snell law
Author:
antonio bellati
New Resources
Sylvester's Four-Point Problem
Open Middle: Distance, Midpoint, Slope (3)
Reflection in a Circle
Reflection in a Regular Polygon
Quadrilateral Vocabulary
Discover Resources
Rhombus to Rectangle
Unusual Tangram 3
Line-RohunPatel-h3b9v7
spiral
РОМбо зураг-2
Discover Topics
Ellipse
Isosceles Triangles
Area
Quadrilaterals
Median Value