Jamie made the tree diagram below to show the different choices he has for ordering a pizza for lunch. A tree diagram. The sizes are large, medium, and small. The crusts are thin or thick. The toppings are tomato or meatball. According to the tree diagram, which best describes how many choices Jamie has for his pizza? three choices for size, two choices for crust, and two choices for topping three choices for size, two choices for crust, and one choice for topping two choices for size, two choices for crust, and one choice for topping two choices for size, two choices for crust, and two choices for topping

Sketching the ladder and wall might help to make the question clearer.  The ladder is represented by the hypotenuse of a right triangle and is opposite the 90-degree angle of this triangle.  The opposite side of this triangle measures 12 feet.  Thus, you have 2 of 3 sides in a right triangle:  a 12-foot opposite side and a 15-foot hypotenuse.  Can you now find the measure of the adjacent side, which is the distance the base of the ladder is located away from the base of the wall?  The Pythagorean Theorem would be the easiest approach to use here, but you could also solve this problem using trig.