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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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bewijs stelling van Pythagoras
Rose Curve
Angle Addition: Warm Up Exercises
Slope and Road Signs
Damped Trochoidal Curve

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Theorem 7.9
endPointsIntervals2
theorem 9-12
Treasure Quest
Resolving Power and Rayleighs Critirion
Frequency / Cumulative Frequency Polygon Construction Tool 頻數 / 累積頻數多邊形製作工具

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Equations
Tangent Function
Pyramid
Statistics
Sphere