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Angle Sum of a Triangle
Author:
sureshbabupp
Topic:
Geometry
The angles of a triangle always sum to 180 degrees. We can use this fact to solve for the missing angle of a triangle.
GeoGebra
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Icosahedron
Tutorial: Create lists of numbers and objects
Dissections by Guillermo Bautista
Icosahedron1
Explore the invariant lines of matrix {{-2,5},{6,-9}}
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Equation of a Circle
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