MESA Entrance Practice Exam 2026 – Complete All-in-One Guide to Excel in Your Admission Test!

In a right triangle, the longest side, the hypotenuse, satisfies the Pythagorean theorem: the square of the hypotenuse equals the sum of the squares of the legs. Here, the legs are 3 and 4, so compute 3^2 + 4^2 = 9 + 16 = 25. The hypotenuse is the square root of that, sqrt(25) = 5. This is the classic 3-4-5 right triangle, where the hypotenuse is the longest side. The other options don’t fit because 6 or 7 would imply larger sums of squares than 25, and 3 cannot be the hypotenuse since it isn’t longer than the legs. Therefore, the hypotenuse is 5.