The kite is approximately 78.80 feet off of the ground. If we assume that the string his held taut without any swag, we can use a right triangle to solve for the height of the kite. For this triangle with a reference angle of 52^o, the hypoteneuse is 100ft and the h is the height on the opposite side of the triangle from the reference angle. Sine of an angle is the ratio of the opposite side ... More @Wikipedia
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