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

Parabolas, Lines and Nomograms
Congruent Figures
Function Art 3D - Flower
Writing and Graphing Proportional Relationships (k>0)
Congruent Sides & Angles in △s: Exploration

Discover Resources

Bu mirascope_complete_focus
Isosceles Triangle Property
calculate the limit as x approaches infinity
Quay_TamGiac_
Bài tập 22a trang 55

Discover Topics

Isosceles Triangles
Pie Chart or Circle Chart
Circumcircle or Circumscribed Circle
Distributions
Rectangle