Question

area of sector of circle of radius 20 cm is 45 sq.cm.find the length of arc of sector​

Answer 1

Answer:

this is the formula for this area of sector type questions will help you

The area of a sector of a circle is ½ r² ∅, where r is the radius and ∅ the angle in radians subtended by the arc at the centre of the circle. So in the below diagram, the shaded area is equal to ½ r² ∅ .

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