This geometry and trigonometry video tutorial explains how to calculate the arc length of a circle using a formula given the angle in radians the and the length of the radius. It also explains how to calculate the sector area in terms of pi or in radians. In addition, it also explains how to determine the area of a sector of a circle using an equation where the angle is given in degrees instead of radians. This video contains plenty of examples and practice problems.

Trigonometry Basic Introduction:
   • Trigonometry  

Introduction to Angles:
   • Introduction to Angles  

Radians and Degrees:
   • Radians and Degrees  

What Exactly Is a Radian?
   • Trigonometry  What Exactly Is a Radian?  

Coterminal Angles:
   • Coterminal Angles In Radians & Degree...  

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Decimal Degrees to DMS:
   • Decimal Degrees to DMS Formula   Con...  

Arc Length of a Circle and Sector Area:
   • Arc Length of a Circle Formula  Sect...  

Linear Speed and Angular Velocity:
   • Linear Speed and Angular Velocity  

Clock to Angle Problems:
   • Clock Aptitude Reasoning Tricks & Pro...  

The Unit Circle:
   • The Unit Circle, Basic Introduction, ...  

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