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Radius and Tangent to a Circle Are Perpendicular

A piece of wi...

Question

A piece of wire 22 cm long is bent into the form of an arc of a circle subtending an angle of 60° at its centre. Find the radius of the circle.

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Solution

Find the radius of circle using formula for finding the length of an arc.

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In a circle of a radius 21 cm, an arc subtends an angle of $60^{\circ}$ at the centre. Find the length of the arc.

Q. A circular wire of radius 7 cm is cut and bent again into an arc of a circle of radius 12 cm. The angle subtended by the arc at the centre is
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Q. In a circle of radius

21

cm, an arc subtends an angle of

60^{0}

at the centre. Find the length of the arc.

Q. In a circle of radius 21 cm, an arc subtends an angle of 60° at the centre. Find (i) the length of the arc (ii) area of the sector formed by the arc. (Use π = 22/7)

Q. Question 16
A piece of wire 20 cm long is bent into the form of an arc of a circle subtending an angle of

60^{\circ}

at its centre. Find the radius of the circle.

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Radius and Tangent to a Circle Are Perpendicular

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