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Cut-The-Knot-Action 11!
Author:
Tim Brzezinski
Topic:
Equilateral Triangles
Creation of this applet was inspired by a
tweet
from
Alexander Bogomolny
.
How can you formally prove what this applet informally illustrates?
GeoGebra
Quick (Silent) Demo
New Resources
Parallel lines, Transversals and Segments
Open Education 2026
רישום חופשי
The Coordinate Plane (Cartesian Plane)
General Polar Equation of Conics with Rotation (2)
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AP Calculus volume problems
Investigating Angles in a Triangle
Modul 10A_Zalimu_SMA Negeri 2 Baubau
Water-Air Refraction of Light
Dudeney: Choosing a Site in an Isosceles Estate
Discover Topics
Tangent Line or Tangent
Real Numbers
Right Triangles
Expected Value
Trigonometry