10. A lunar lander, Eagle, traveled aboard Apollo 11, and descended to the surface of the moon on July 20, 1969. Before sending Eagle to the surface of the moon, Apollo 11 orbited the moon three miles above the surface. At one point in the orbit, the onboard guidance system measured the angles of depression to the near and far edges of a large crater. Eagle sees the crater off to one side of the Apollo 11 so that the angles of depression are 25 and 18. Find the distance across the crater.