The altitude of a hang glider is increasing at a rate of 6.75 m/s. At the same time, the shadow of the glider moves along the ground at a speed of 17.0 m/s when the sun is directly overhead. Find the magnitude of the glider's velocity. I drew this diagram all out and I still cannot understand the concept of this. I don't understand...I could figure this out if I was given an angle at wihch the hang glider was traveling...but since Im not i do not know how to figure this out. Where can I start??? any help please??