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Cut-the-Knot Action 15!
Author:
Tim Brzezinski
Topic:
Circumcircle or Circumscribed Circle
,
Incircle or Inscribed Circle
Creation of this applet was inspired by a
tweet
from
Alexander Bogomolny
.
How can we formally prove THIS to be true?
GeoGebra
Quick (Silent) Demo
New Resources
Variation Theory Parallelogram Proofs
Parallelograms: Quick Investigation
Explore the invariant lines of matrix {{-2,5},{6,-9}}
Tutorial: Zip command
Tutorial: Create lists of numbers and objects
Discover Resources
Construction of Perpendicular Lines
Area Triangle
Modul 19-A_Zalimu_SMAN 2 Baubau
Three mutually tangent circles - analysis
Interpreting and Using Exponential Functions: IM Alg2.4.7
Discover Topics
Scalene Triangles
Function Graph
Rhombus
Tangent Function
Orthocenter