Sangaku --- extension

Author:FUKUCHAN

Radius ratio of red and blue circle is BP:CP. Red circle is the inscribed circle with maximum radius. You can draw the following figures, using only ruler and compass.

New Resources

Cartesian Notation of a Vector
Rolling a Square
Open Education 2026
רישום חופשי
Circumference of a unit circle

Discover Resources

Rates and Ratios
Quadric "best fit" through 9 points
Archimedes' Method of Approximating Pi
L11: Critical damping

Discover Topics

Arithmetic
Hypothesis Testing
Pythagoras or Pythagorean Theorem
Differential Equation
Hyperbola