PRE- CAL

Circle - set of all points in a plane that are equidistant from a fixed point called center.

Diameter - distance from any point to any point on a circle.

radius - distance from the center to any point on the circle.

Standard Form of a circle - (x+h)² + (y+k)² = r²

General form of circle - x²+y²+Dx+Ey+f=0

Parabola - set of all points in a plane that are equidistant from a fixed line called directrix and a fixed point called focus.

Vertex - the lowest or highest point of a parabola.

Directrix - line perpendicular to the axis of symmetry of parabola and does not that the parabola.

Latus Rectum - chord passing through the focus and perpendicular to the axis of symmetry.

Axis of symmetry - line that passes through the vertex and perpendicular to the directrix

Standard form of parabola - y=ax²+bx+c

Vertex form of parabola - y=a(x-h)+k

Ellipse - set of all points in a plane such that the sum of its distances from two fixed points on a plane is constant.

Foci - plural form for focus

standard form of ellipse - (x-h)^2/a^2 + (y-k)^2/b^2 = 1