Which of the following is equidistant from a given directrix and focus? a. a locus of points called a circle b. a locus of points called a hyperbola c. a locus of points called a parabola d. a locus of points called an ellipse

A3cm×3cm\greend{3\,\text{cm} \times 3\,\text{cm}} 3cm×3cm start color greend, 3, space, c, m, times, 3, space, c, m, end color greend rectangle sits inside a circle with radius of 4cm\blued{4\,\text{cm}} 4cm start color blued, 4, space, c, m, end color blued . what is the area of the shaded region? round your final answer to the nearest hundredth.