Midpoint and distance in the coordinate plane.

Question

A singles tennis court is a rectangle 27 feet wide and 78 feet long. Suppose a player at corner A hits the ball to her opponent in the diagonally opposite corner B. Approximately how far does the ball travel, to the nearest tenth? 

Answer 1

Use Pythagorean theorem to find length of diagonal of the 27 ft by 78 ft rectangle.