Triangles

What makes a triangle equilateral, isosceles, or scalene?

How are these triangles the same? How are they different? Manipulate the triangles by dragging their blue corner points. What happens to their side lengths?

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'Einstein' tile vitral

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Partitioning a Line Segment
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Chebyshev LInkage
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Vectors
Statistics
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Quadratic Functions
Trigonometry