1. The problem asks for the direct distance from home plate to second base on a baseball diamond, which is a square with sides of 90 feet. 2. To find the direct distance between two opposite corners of a square, we use the Pythagorean Theorem. 3. The Pythagorean Theorem states that in a right triangle, the square of the hypotenuse ($c$) is equal to the sum of the squares of the other two sides ($a$ and $b$): $$c^2 = a^2 + b^2$$ 4. Since the baseball diamond is a square, the distance from home plate to second base is the diagonal of the square. 5. The diagonal forms a right triangle with two sides of length 90 feet each. 6. Therefore, the distance can be found by calculating the hypotenuse of a right triangle with legs 90 feet and 90 feet. The best method to solve this problem is the **Pythagorean Theorem**.