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

Sets and HCF of Two Numbers
Untitled
Multiplication with Area Models
Nefroida
Multiplying 2-Digit by 2-Digit Numbers Using an Area Model

Discover Resources

Number line movements and operations
Tangent to x squared
Kite with right angle
Maclaurin series for sinx
Complex roots of ax^2+bx+c

Discover Topics

Continuity
Sequences and Series
Distributions
Similar Triangles
Circumcircle or Circumscribed Circle