Conic Sections Jhun Vert Mon, 04/27/2020 - 04:35 pm

Definition
Conic sections can be defined as the locus of point that moves so that the ratio of its distance from a fixed point called the focus to its distance from a fixed line called the directrix is constant. The constant ratio is called the eccentricity of the conic.
 

Conic Sections (Cutting Plane Passing Through a Cone)

 

The Circle

Video

The following are short descriptions of the circle shown below.

Tangent
Tangent is a line that would pass through one point on the circle.
Secant
Secant is a line that would pass through two points on the circle.
Chord
Chord is a secant that would terminate on the circle itself.
Diameter, d
Diameter is a chord that passes through the center of the circle.
Radius, r
Radius is one-half of the diameter.

 

The Circle