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Quadrilateral Surprise!
Author:
Tim Brzezinski
How would you put this property (dynamically illustrated below) into words? (Applet works best if quadrilateral is kept convex.) How can you formally prove what this applet informally illustrates?
GeoGebra
Quick (Silent) Demo
New Resources
van Aubel's Theorem
Supplementary Angles
Slope of a Straight Line: Run and Rise
Rotating Points (Optical Illusion)
Simplifying Radicals: Geometric Thin Slice
Discover Resources
Loc Geometric Omotetie.
Shermir test 3
Perpendicular bisector
Pythagorean Theorem Proofs
Modul 4A_Amrin_SMAN 2 Baubau
Discover Topics
Integral Calculus
Bar Chart or Bar Graph
Intersection
Angles
Hypothesis Testing