A Mastery Challenge

This was a very easy mastery challenge. All I had to know was how to determine the angle of a right triangle from the length of two sides and how to determine the the range and domain of a function from a graph. The domain of a function on a graph is the beginning and the ending of the measurement on a graph. The range of a function is the weakesst and the strongest measurement on  the graph. To explain how to determine the angle of a right triangle, the previous will explain. It's really hard to explain. The screenshots below will assist you in understanding the given tasks on Khan Academy.