Super Simple Mastery Challenge

This mastery challenge game me a circle with a radius of two units. They told me to solve for the circumpherence of the circle. To get the answer, multiply the radius by 2 to get the diameter then multiply it by pi. I just put in 4pi in the answer. The next task gave me two intersecting lines, angle measurements, three possible answers and, a tool to rotate the blue line. The image below shows how the task looked like when it was finished. The next screenshot will show you what was the first task.