Conic section

The black boundaries of the colored regions are conic sections.

Ellipse (e=1/2), parabola (e=1) and hyperbola (e=2) with fixed focus F and directrix (e=∞).

In mathematics, a conic section (or simply conic) is a curve obtained as the intersection of the surface of a cone with a plane. The three types of conic section are the hyperbola, the parabola, and the ellipse. The circle is a special case of the ellipse, and is of sufficient interest in its own right that it was sometimes called a fourth type of conic section. The conic sections have been studied by the ancient Greek mathematicians with this work culminating around 200 BC, when Apollonius of Perga undertook a systematic study of their properties.

单词	Latus Rectum
释义	Latus Rectum 英语百科 Conic section In mathematics, a conic section (or simply conic) is a curve obtained as the intersection of the surface of a cone with a plane. The three types of conic section are the hyperbola, the parabola, and the ellipse. The circle is a special case of the ellipse, and is of sufficient interest in its own right that it was sometimes called a fourth type of conic section. The conic sections have been studied by the ancient Greek mathematicians with this work culminating around 200 BC, when Apollonius of Perga undertook a systematic study of their properties.
随便看	Restrictive practice Restrictive Practice Act Restrictive practices Restrictive Practices Court restrictive prevention restrictive provision restrictive provisions restrictive recognition restrictive regulation restrictive relative Restrictive relative clause restrictive relative clauses restrictive respiration restrictive ring seal restrictive rule restrictive section restrictive sight distance restrictive sign restrictive stability restrictive system restrictive temperature restrictive theory restrictive trade Restrictive trade practice restrictive trade practices

Latus Rectum

Conic section