For any right triangle ACB the sum of
the areas of the lunes BC and AC is equal to the area of the
triangle.
A lune is a plane figure bounded by two circular arcs of unequal
radii.
See also:
Hippocrates 2,
Hippocrates 3,
Hippocrates 4,
Squaring the Circle,
Pythagoras and
Circle Area,
Similar
shapes.
