From another point F, Clay measures 20 meters to D and 50 meters to E. Reece says that last summer this area dried out so much that he could

From another point F, Clay measures 20 meters to D and 50 meters to E. Reece says that last summer this area dried out so much that he could walk the 49 meters from D to E. What is the measurement of Angle F? Round intermediate results to 3 decimal places and the final answer to 1 decimal place.