Complete the sentence below.
On a circle of radius r, a central angle of θ radians subtends an arc of length s = …………..; the area of the sector formed by this angle θ is A = ………………
Solution:-
On a circle of radius r, a central angle of θ radians subtends an arc of length s = r θ; the area of the sector formed by this angle θ is A = 
r2 θ.