Arc Length and Area of a Sector | Formulas | Sample Problems | Trigonometry | Pre-Calculus

Pre-Calculus
Arc Length and Area of a Sector | Formulas | Sample Problems | Trigonometry

Arc Length
In a circle of radius r, the length s of an arc intercepted by a central
angle with measure θ radians is given by s = rθ.

Area of a Sector
In a circle of radius r, the area A of a sector with a central angle
measuring θ radians is A=1/2 r^2 θ.


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