arithmetise the calculation of the
circumferance of a circle with " pi ".
well he is wrong - he never gets an exact
equation anyway - this is how to do it -
STEP 1 take two lengths of thin card, length of thin card 1 and length of thin card 2 - length of thin card 2 is twice the length of length of thin card 1.
STEP 2 to the surface of each length of thin card stick, with ordinary glue, a length of tape measure, starting, in both cases at 0 on the tape measure.
STEP 3 now turn each length of thin card into a circle by sticking one end of the length of thin card to the other.
STEP 4 you can now determine the circumferance of the circle you have made from strip of thin card 1 just by looking at the tape measure you have stuck to its surface. the same applies to the circle made from strip of thin card 2.
STEP 5 now take an ordinary ruler and measure the radius of the circle you made with strip of thin card 1. you now know that a circle with this radius has the circumferance of the length measured on the tape measure. the same applies to the circle made with strip of thin card 2.
STEP 6 you can now build a scale - you could call these cicular inches . . . .
btw this is an 8 BYTE expression -