The Shoemaker's Knife

Topic:Area

The area enclosed by the semi-circles centred O, X and Y and on the same diameter is called the Shoemaker's Knife. The radii of the two smaller semi-circles are variable. This is illustrated in the diagram below.

New Resources

apec
גיליון אלקטרוני להעלאת נתוני בעיה ויצירת גרף בהתאם
seo tool
Morse code visualizer / decoder
International Day of Mathematics 2025

Discover Resources

Angle Side Angle (ASA)
math circle
Measuring the Exterior Angles of a Triangle 3
hexagon

Discover Topics

General Quadrilateral
Boxplot
Hypothesis Testing
Polygons
Angles