How Much Hair Is On My Head

       To determine how much hair is on someone's head, you must first determine the area of the head by using the mathematical equation used to determine the area of a circle. In this case the circle will be the head. After determining the area of you head, you must determine how much hair fits in a specific amount of area. I will use some examples to demonstrate. The area of my head is 20 inches^2. In 4 inches^2 There is 100 hair. Therefore, the total amount of hair is 500 because you would multiply 100 by 5. The step I just showed needs some further explaining. We are using proportions right now. If you put 20 inches over 4 inches, that simplifies down to 5. You would then multiply 5 by the 100 because 4 out 20 inches is 1/5, and you need to know the whole. Therefore, you will multiply by the reciprocal which is 5. 100*5=500.