9. (8th grade) The center of the circle inscribed in a right trapezoid is 2 cm and 4 cm away from the ends of the lateral side. Find the area of the trapezoid.
9. Triangle $O C D$ is a right triangle, $O C=2 \mathrm{~cm}, O D=4 \mathrm{~cm}, C D=2 \sqrt{5} \mathrm{~cm}$. Let $O K \perp C D, O K=r=\frac{4 \sqrt{5}}{5} \mathrm{~cm}$. The height of the trapezoid $H=\frac{8 \sqrt{5}}{5} \mathrm{~cm}$. The sum of the bases of the trapezoid is $\frac{18 \sqrt{5}}{5} \mathrm{~cm}$. The area of the trapezoid is 14.4 sq. cm.