Which best explains whether a triangle with side lengths 2 in., 5 in., and 4 in. is an acute triangle? The triangle is acute because 22 + 52 > 4^2. The triangle is acute because 2 + 4 > 5. The triangle is not acute because 22 + 42 < 5^2. The triangle is not acute because 22 < 42 + 5^2.