**The area of the region bounded by the circle x2+y2 = 1 is (a) 2π sq.units (b) π sq.units (c) 3π sq.units (d) 4π sq.units**

###### Answers:

(b) We have, x^{2} + y^{2} = 1, which is circle having centre at (0,0) and radius ‘1’

⇒ y^{2} = 1-x^{2}

⇒ y = √1-x^{2}

From the figure, area of the shaded region