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GoGeometry Action 59!
Author:
Tim Brzezinski
Topic:
Parallelogram
,
Quadrilaterals
Creation of this applet was inspired by a
post
from Antonio Gutierrez (
GoGeometry
). Feel free to move any of the BIG POINTS anywhere you'd like.
How can we formally prove what this applet informally illustrates?
GeoGebra
Quick (Silent) Demo
New Resources
Explore the invariant lines of matrix {{-2,5},{6,-9}}
Poorly Drawn Parallelograms 3
探究由平行線和截線所成的角
alg2_05_05_04_applet_exp_fxn_flvs
Droste effect draft
Discover Resources
Sep 28 Vectors
Consecutive Interior Converse
Sum of Exterior Angles of Hexagon
Parallels
Earth and Sun To Scale
Discover Topics
Differential Calculus
Quadratic Functions
Circumcircle or Circumscribed Circle
Intersection
Conic Sections