Maths Project | Proof of Area of Sector | Circle | Grade 10

Hello friends, I have come with an activity which will be helpful to understand the formula of Area of Sector, in chapter of circle, to class 10
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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