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Angle Exploration for Quadrilaterals
Author:
Jim Doherty
In this sketch you can explore the sum of the sides of a quadrilateral and the sum of the interior angles of a quadrilateral by choosing any vertex to move.
GeoGebra
New Resources
"Compressed" Astroid as Envelope
Bottema's Theorem
Ellipse, Hyperbola and Circle as Envelopes
Teorema Japonês para quadriláteros inscritos em uma circunferência
Witch of Agnesi - A Classical Construction
Discover Resources
Seagull Line of Reflection Symmetry
Animation 96
GER- FONKSİYON ASİN (kx+n)
Beautiful regular pentagon-A
Volume of cylinder inside a cone
Discover Topics
Hyperbola
Combinatorics
Dilation
Real Numbers
Quadratic Equations