Which is the 30o-60o-right triangle theorem? A. In a right triangle, the hypotenuse is twice as long as a leg if, and only if, the measure of the angle opposite that leg is 30o. B. In a right triangle, the hypotenuse is three times as long as a leg if, and only if, the measure of the angle opposite that leg is 30o. C. In a right triangle, the hypotenuse is twice as long as a leg if, and only if, the measure of the angle opposite that leg is 60o. D. In an equilateral triangle, the hypotenuse is twice as long as a leg if, and only if, the measure of the angle opposite that leg is 30o.