Area of Sector/Arc Length

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by Softballmoma
Last updated 6 years ago

Discipline:
Math
Subject:
Geometry

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Area of Sector/Arc Length

Area of Sector, use area of circle.Arc Length, use circumference of circle

HandoutNotes

Area of Sector/Arc Length

Area and Circumference of CirclesArea = π × r2 Circumference = 2 × π × rr = radius

CCGPS: MCC.9-12.G.C.5 Finding the area of a sector and the arc length using the area of a circle and the circumference of a circle.Why is it important to know the area of a sector and the length of the arc?Where would we possibly use this information in the real world?

Circle = 360 degrees

Find the area of the shaded sector of circle O. The radius is 6 inches and the central angle is 100°. Express answer to the nearest tenth of a square inch.


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