It is not possible to answer the question at that kind of precision because a single wave on a beach will change the value.
NONE
The perimeter is 60 mm
Six cm per side.
20 cm
The answer is 45.72 centimeters. One inch is equal to 2.54 centimeters. To convert inches into centimeters, multiply the inches by 2.54.
The perimeter of this square measures 4 x 1 = 4 decimeters. As 1 decimeter = 10 centimeters then 4 decimeters = 4 x 10 = 40 centimeters.
66
it would be 21/3
A perimeter is the distance around the outside edge of something. A centimeter is a way of measuring that distance. You can't convert centimeters into perimeter. You can only measure the perimeter. Centimeters are a fairly small unit. About the distance that your thumb is wide.
From sea level it's about 480 KM up until outer space. That's 48,000,000 cm.
The answer depends on how many sides the shape has. For each number of sides (รขโฐยฅ 3), there is a shape that will meet the requirements of the question.
500. Half a meter on each side.