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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?

New Resources

Random Polar Curve (3)
Fourier Lissajous (Mechanical)
Angle Addition: Warm Up Exercises
Damped Trochoidal Curve
Hyperbolic Paraboloid

Discover Resources

Angles in Same Segment (Proof)
Interactive Video Testing
The trapezium rule.
Variability and MAD: IM 6.8.11
Articulated prism

Discover Topics

Isosceles Triangles
Coordinates
Cone
Conditional Probability
Fractal Geometry