Studied by 2 people
Def of circle
A set of points a given distance from a given point(the center) in a plane
Def of sphere
A set of points a given distance from a given point(in space not in a plane)
Central angle
An angle with its vertex at the center of a circle; it is = to its intercepted arc
Intercepted arc
The arc cut off by and angle of a circle (the angle could be a central<or another<)
Minor arc
An arc between 0 to 180 degrees in a circle
Major arc
An arc between 180 to 360 degres
Circumference formula
C=2pir
Area formula for a circle
A=nr²
