Identify the sentence that correctly uses the word as when making a comparison. Multiple choice question. The ancient Greek mathematician Eratosthenes realized that he could determine the circumference of the Earth using a mathematical formula that is simple as any taught in a high school geometry course. The ancient Greek mathematician Eratosthenes realized that he could determine the circumference of the Earth using a mathematical formula that is as simple as a high school geometry course. The ancient Greek mathematician Eratosthenes realized that he could determine the circumference of the Earth using a mathematical formula that is as simple as any taught in a high school geometry course