. A triangle has side lengths of 3 cm, 4 cm, and 5 cm. Which statement about this triangle is true? The triangle is obtuse. The triangle is both acute and obtuse. The triangle is neither acute nor obtuse. The triangle is acute.
To determine whether the triangle is acute, right, or obtuse, add the squares of the two smaller sides, and compare the sum to the square of the largest side. Since this sum is greater, the triangle is acute.
