Circumference of a Circle

The circumference (perimeter) of a circle can be measured using the formula
C= π x Diameter.

Students in Mr. Lupu’s Essential Math class set out to see if this is true by manually measuring the perimeter of a variety of circular objects using a string and a ruler. Then they applied the formula and compared their manual results to formula results.

Below is Nate’s results.

Nate Circumference.jpg

Nate- “I am happy with my results. My manual measurements were close to the answers derived from the circumference formula. I probably could have measured more accurately on some, but I may have stretched the string a little during measuring. I am now convinced that Circumference does equal  π x D”