Special Cases
Any square, rectangle, isosceles trapezoid, or antiparallelogram is cyclic. A kite is cyclic if and only if it has two right angles. A bicentric quadrilateral is a cyclic quadrilateral that is also tangential and an ex-bicentric quadrilateral is a cyclic quadrilateral that is also ex-tangential.
Read more about this topic: Cyclic Quadrilateral
Famous quotes containing the words special and/or cases:
“When, in some obscure country town, the farmers come together to a special town meeting, to express their opinion on some subject which is vexing to the land, that, I think, is the true Congress, and the most respectable one that is ever assembled in the United States.”
—Henry David Thoreau (1817–1862)
“I have always felt that the real purpose of government is to enhance the lives of people and that a leader can best do that by restraining government in most cases instead of enlarging it at every opportunity.”
—Gerald R. Ford (b. 1913)