Circles

Conics formulas follow (just familiarize yourself with these at first)

Features of a circle from its standard equation | Analytic geometry (practice) | Khan AcademyFind the center and radius of a circle given the equation in standard form.

To find the radius for the activity below, you may need to use the distance formula you learned in Geometry. Do an internet search on it if you need to see some examples.

Circles | High school geometry | Math | Khan AcademyExplore, prove, and apply important properties of circles that have to do with things like arc length, radians, inscribed angles, and tangents.