Arc Length of Sector
Arc Length of Sector
Arc Length of Sector: Applying the unitary method and taking the whole length of the circle (of angle ) as
, we can obtain the required length as
Example: The perimeter of a certain sector of a circle of radius 5.6 m is 27.2 m. Find the arc length of sector.
Solution: r + r + l = 27.2
5.6+ 5.6 + l = 27.2
11.2+ l = 27.2
l = 27.2 - 11.2= 16 m
Example: Find the length of the arc of a sector subtending an angle of 60 degree at the centre. The Radius being 12 m.
Solution Let be the angle subtended by the arc at the centre. We have
The area of a sector of circle of radius 9 cm is 9 | |||
| Right Option : A | |||
| View Explanation | |||
the length of an arc, which subtends an angle of | |||
| Right Option : B | |||
| View Explanation | |||
The area of a sector of a circle of radius10 cm cut off by an arc which is 22 cm long is ______________ | |||
| Right Option : B | |||
| View Explanation | |||
Students / Parents Reviews [10]
I have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
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Manish Kumar
10thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
