Take a hoop, measure its diameter with a string, place this string on the outside of the hoop and see how many times its length will be required to go around it. ... But if you wish to be more exact, observe the following rule : To find the circumference of a circle, multiply its diameter by 3.1416. If you ... Find the area of a circle by multiplying the diameter by itself, then multiplying this product by Ap of \ 8-, or \\.
|Title||:||Manual of Object-teaching|
|Author||:||Norman Allison Calkins|