You must utilize the Pythagorean Theorem to eliminate this complication. In this occurrence, you are to find the hypotenuse, therefore compelling 35 and 50 to be the a^2 and b^2 of the formula. Thus, the equation you shall have obtained will be 35+50=c^2. You may find c^2 equals 85. That is correct, however it is not the answer, so DO NOT put that as the answer. You must find the square root of 85, which will come out to be approximately 9.2 and THAT is your answer. Do not be fooled.