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What is the arc length of a sector and how do you find it

1,641 views · Published 8 November 2012 · 3:56 · Indexed 4 November 2026

Channel: Brian McLogan · 2012 · Education

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👉 Learn about angles in trigonometry. An angle is the figure formed by two rays sharing the same endpoint. The two rays are called the sides of the angle while the common endpoint of the two rays is called the vertex of the angle.

Angle is measured in radians or in degrees. The radian is the measure of the length of an arc of a unit circle or the measure of the radius of the circle on the circumference of the circle. pi radians is equivalent to 180 degrees. One complete revolution about a point is equivalent to 2pi radians and 360 degrees. A plane is usually divided into 4 equal parts called the quadrants. 

The angle measured in the anti-clockwise direction is called a positive angle while a negative angle is measured in the clockwise direction. We measure angles starting from the positive x-axis.

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Organized Videos:
✅ Angles in Trigonometry
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMrdn9zTKTFo5MayxpoQkKWB
✅ Solve Problems with Arc Length
https://www.youtube.com/playlist?list=PL0FAA8F3A4A64C0CD
✅ Angles in Trigonometry | Learn about
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMpqCJQreDI0Q7ibZ-q8pQ8v
✅ Sketch Angles in Standard Position
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMqYCdsQY6BeWuw4GIxNq-Ps
✅ Find the Quadrant of the Angle
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMquYefa135efFiGsBTEMwZY
✅ Find the Reference Angle
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMpxWekQ0Nll5aeJRLj8IAcS
✅ Complement and Supplement of an Angle
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMocTFwM1FKKocsENTOyFjMe
✅ Convert Radians to Degrees 
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMqaSH_QGSKbBFVkIZn63I74
✅ Convert Degrees to Radians
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMppuYwc90qqVM-EtIIfu0KJ
✅ Convert Degrees to Degree Minute Seconds
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMoAVUc0hQVM9F2mtTZ5zIXP
✅ Convert Degree Minute Seconds to Degrees
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMrZmQzUM7FeVAsKtYOqM8VT
✅ Coterminal Angles | Learn About
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMoqhYuu6l44dkl97jg3V62_
✅ Find Coterminal Angles | 0 and 2pi
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMrJJVmzS9g-s6nDoIXrIR2l
✅ Find Coterminal Angles | 0 and 360
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMoA7QwPW6Wd78ePabiyQwOZ

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