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Sky high (S). On a sunny, warm day, a student decides to fly a kite on the college green just to relax. His kite takes off and soars. He lets all 150 feet of the string out and attracts a crowd of onlookers. There is a slight breeze, and a spectator 90 feet away from the student notices that the kite is directly above her. Unlike a real kite, this math-question kite has the string going in a straight line from the student to the kite. How high is the kite from the ground?
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The Heart of Mathematics: An Invitation to Effective Thinking
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