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Polygon Interior Angle Sum Theorem
Author:
Louisa Puffett
GeoGebra
New Resources
Construct a Square
Isosceles Triangle: Quick Construction
Cross Product in 2D and 3D
Bottema's Theorem
Simplifying Radicals: Geometric Thin Slice
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More meaningful math
Angle at Center proof
y=ax^2+β
Fibonacci Spiral Catinca (RO)
Flatarmál þríhyrnings
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Multiplication
Intersection
Interest Calculation
Secant Line or Secant
Right Triangles