Circles Inscribed in Or Circumscribed About Other Figures
In every triangle a unique circle, called the incircle, can be inscribed such that it is tangent to each of the three sides of the triangle.
About every triangle a unique circle, called the circumcircle, can be circumscribed such that it goes through each of the triangle's three vertices.
A tangential polygon, such as a tangential quadrilateral, is any convex polygon within which a circle can be inscribed that is tangent to each side of the polygon.
A cyclic polygon is any convex polygon about which a circle can be circumscribed, passing through each vertex. A well-studied example is the cyclic quadrilateral.
A hypocycloid is a curve that is inscribed in a given circle by tracing a fixed point on a smaller circle that rolls within and tangent to the given circle.
Read more about this topic: Circle
Famous quotes containing the words circles, inscribed and/or figures:
“The whole force of the respectable circles to which I belonged, that respectable circle which knew as I did not the value of security won, the slender chance of replacing it if lost or abandoned, was against me ...”
—Ida M. Tarbell (1857–1944)
“Farewell sadness
Good-day sadness
You are inscribed in the lines of the ceiling.”
—Paul Éluard (1895–1952)
“She, while her lover pants upon her breast,
Can mark the figures on an Indian chest.”
—Alexander Pope (1688–1744)