# Thread: [SOLVED] cylinder &amp; blueprint

1. ## [SOLVED] cylinder &amp; blueprint

thanks you

2. Originally Posted by jadee
Hello,

i have a little excercise to do but i have some difficulty.
Can you help me plz ?!

The length of the rectangle has to fit around the top and base circle. Therefore the length of the rectangle must be the circumference of the circle which is calculated by:

$c = 2\pi \cdot r$

3. Originally Posted by jadee
Hello,
i have a little excercise to do but i have some difficulty.
Can you help me plz ?!
B)
construct the blueprint

Could you define what this means?
I do not know if this means to prepare a drawing, as would a draftsman (ok, draftsperson) or something to do with the blueprint process. The "blueprint" process was discontinued many years ago -- hazardous materials --> EPA -- which meant high costs that lead to alternative methods.