A right triangle has a leg with a length of 21 units and a hypotenuse with a length of 21 V2 units Eunice states that because the hypotenuse is twice the length of the given leg, the right triangle is a 30"-60"90" triangle.​

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.