Answer asap i will give brainiest ( must have answers and explanation to the answers) at a zoo, the lion pen has a ring-shaped sidewalk around it. the outer edge of the sidewalk is a circle with a radius of 11 m. the inner edge of the sidewalk is a circle with a radius of 9 m. (a) find the exact area of the larger circle (b) find the exact area of the smaller circle. (c) write an expression to find the exact area of the sidewalk (shaded portion). (d) find the approximate area of the sidewalk. use 3.14 to approximate π.