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Circumference

We have a cir...

Question

We have a circle with centre O and two radii OA and OB. If the perimeter of minor sector OAB is 55 cm, and the radius of the circle is 7cm, the value of ∠AOB is

110^o

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45^o

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180^o

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450^o

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Solution

The correct option is D
450^o

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Similar questions

If O is the centre of the circle, and OA and OB are two radii, find the ratio of the area of the sector AOB to the area of the circle, if ∠ AOB = 60

O A B

O

12 c m s

m ∠ A O B = 60^{o}

A O B

△ O A B

O

2.5 c m

O A

O B

∠ A O B = 60^{\circ}

A B

¯ ¯¯¯¯¯¯ ¯ O A

¯ ¯¯¯¯¯¯ ¯ O B

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