The supplement of an angle is however many degrees need to be added to the angle they give you to equal 180 degrees. To find it subtract the angle (72 degrees) from 180 degrees. So: 180-72=your answer
An Olympic long jumper leaves the ground at an angle of 23 degrees and travels through the air for a horizontal distance of 8.7 meters before landing. What is the takeoff speed of the jumper?