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Arc (geometry) - Wikipedia


To get the area of the arc segment, we need to subtract the area of the triangle, determined by the circle's center and the two ...

Sectors, Areas, and Arcs - Purplemath


Explains formulas for areas of sectors of circles and lengths of arcs. Demonstrates how to use the formulas in each of degrees and radians.

Cool math .com - The Trigonometry of Circles - arc length, area of a ...


Definitions and formulas for the arc and the arc length of a circle, sector and the area of the sector of a circle, the unit circle, the angles on the unit circle in ...

Cool math .com - The Geometry of Circles - Radius, Diameter ...


Definitions and formulas for the radius of a circle, the diameter of a circle, the circumference (perimeter) of a circle, the area of a circle, the chord of a circle, arc  ...

Circle Sector and Segment - Math is Fun


And the Segment, which is cut from the circle by a "chord" (a line between two ... You can work out the Area of a Sector by comparing its angle to the angle of a ...

Area of a sector of a circle - Math Open Reference


The formula used to find the area of a circlular sector - a pie-shaped part of a ... Area. = R. L. 2. where: L is the arc length. R is the radius of the circle of which the  ...

Arc Length definition - Math Open Reference


Definition of arc length and formula to calculate it from the radius and central angle of the arc.

Circular Segment -- from Wolfram MathWorld


of the (shaded) segment is then simply given by the area of the circular sector ( the entire wedge-shaped ... so the geometric centroid of the circular segment is ...

Area of Sectors - Regents Exam Prep Center


Area of a sector | Sectors (video) | Khan Academy


A worked example of finding the area of a circle's sector using the area of the circle ... Some of the geometry section overlaps with the trigonometry section, which ... If you know the arc length and the radius, then the angle that is subtended by ...