Category
page 1Arbelos
arbelos
right|thumb|320px|An arbelos (grey region)
thumb|Arbelos sculpture in Kaatsheuvel, Netherlands
Archimedes' twin circles
two congruent circles within an arbelos, tangent to a segment perpendicular to the base
Pappus chain
chain of tangent circles within an arbelos
Book of Lemmas
mathematical treatise attributed to Archimedes
Archimedean circle
circle in the arbelos congruent to the twin circles
Bankoff circle
circle formed from an arbelos, orthogonal to two of the semicircles of the arbelos and to a tangent circle within it