GoGeometry Action 58!
Creation of this applet was inspired was inspired by a
from Antonio Gutierrez (
Shown below are 2 regular pentagons.
What is the measure of the pink angle?
How can you formally prove what this applet informally illustrates?
Quick (Silent) Demo
Orthocenter of a Triangle
Degree Measure - Positive and Negative Angles
Radii of Same Circle
Instantaneous Rate of Change Motivation
bisect a segment
Tiesinio reiškinio grafikas
Transformations of Parabolas
Coins in a row