Cut-The-Knot-Action 8!

Author:Tim Brzezinski

Creation of this applet was inspired by a tweet from Alexander Bogomolny. How can you formally prove that the area of the orange triangle is less than or equal to

of the area of the ENTIRE TRIANGLE?

New Resources

apec
Parallel lines, Transversals and Segments
AI for Math Teachers (prompt examples)
巧算長方形周界
Rolling a Square

Discover Resources

unit 6
Abhijit
Proof of pythagoras
Introduction to Angles
A1.ACE.1 - Verbal expression to algebraic expression

Discover Topics

Function Graph
Step Functions
Trapezium
Congruence
Geometric Distribution