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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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Building Parallelograms with Set Areas
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Building Triangles with Set Areas
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Discover Resources

Terris, D Ch 8
Shift in graph of equation x=a when a is increased
Algebra 2 Investigations
Polynomial Magic Trick
Exploration of Rational Functions

Discover Topics

Frequency Distribution
Coordinates
Addition
Trapezoid
Multiplication