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Problem 10 - Entrance Test

In the figure, the length of the hypotenuse of the right triangle is 10, and the length of one leg is 6. What is the length of the other leg?

Correct: C

Using the Pythagorean Theorem, which states that in a right triangle, the square of the length of the hypotenuse (c) is equal to the sum of the squares of the lengths of the other two sides (a^2 + b^2 = c^2), where c = 10 and one leg (let's say a) = 6, we can solve for the other leg (b). The equation becomes 6^2 + b^2 = 10^2. This simplifies to 36 + b^2 = 100. Subtracting 36 from both sides gives b^2 = 64. Taking the square root of both sides, we find b = 8.