Circle Formulas
Circle Area
Circle Perimeter
Arc Length
Circular Sector Area
Area of a Circular Segment
The circular area of the segment AB = Area of the circular sector AOB - Area of triangle AOB
Lune of Hippocrates
Area of the lune = area of the semicircle − area of circular segment.
Area Enclosed between Two Concentric Circles
Area of a Circular Trapezoid
Angles in a Circle
