Wrap the strip of paper around the plate or can and mark it where it completes a full circle around the object. Then lay the strip on a flat surface and measure the marked length using the ruler. That length is the perimeter (circumference) of the round object.
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You could measure the plate first and then get a piece of paper and look at the measurement you got on the ruler and put the piece of paper on the measurement and then cut it out
First run on the perimeter the paper strip and note the end.
After this measure with the ruler the perimeter on the paper strip.
well density measures how much an object is by its size and you calculate it by finding the mass then volume.Then you divide the two answers then whatever answer you get,you round it to the nearest tenths
Circle is geometrical figure it is made by using compass box and round is shape of circle there is no need of compass box to made up round
Any theory which involves things orbiting round a central object. Such as the early theory of atomic structure.
it depends how you accurate you want it, or how precise (they are different things) you could say -0.7 or you could say -1
Exactly 40+10+40+10 = 100cm which is its perimeter