Cut-the-Knot-Action 13!

Author:Tim Brzezinski

Creation of this applet was inspired by a tweet from Alexander Bogomolny. LARGE points are moveable at any time. How can you formally prove what this applet informally illustrates?

New Resources

Right Triangle Inscribed in a Semicircle
Perpendicular Lines: Quick Exploration
挂谷问题——三尖瓣形
Congruent Figures
Parabolas, Lines and Nomograms

Discover Resources

Circle Theorem & Tangents 1
שיעור 3
Lippman 3-3 # 51
Book
DILATED POLYGON ROTATION SEQUENCE PATTERN

Discover Topics

Geometric Distribution
Step Functions
Bar Chart or Bar Graph
LCM and GCD
Arithmetic Operations