For a given area a circle has least perimeter. eg Let area = 100 sq cms. For the square or rectangle the perimeter = 40 cms For the circle the radius is square root of 100/3.1416 = 5.64 and the circumference = 2 x radius x 3.1416 = 35.44 cms
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Some two-dimensional shapes: square triangle rectangle diamond circle trapezoid
40 meters.
here are some: 2d shapes- square circle triangle Rectangle 3d shapes- cone cuboid cube prism
If the rectangle is a square, the perimeter is 48 cm. If not, there are a lot of possibilities.
The area doesn't tell you the perimeter.-- If the square mile is inside a circle, then the perimeter (circumference) is 3.545 miles.-- If the square mile is inside a square, then the perimeter is 4.000 miles.-- If the square mile is inside rectangle that's 2 miles long and 1/2 mile wide,then the perimeter is 5.000 miles.-- If the square mile is inside a rectangle that's 10 miles long and 0.1 mile wide,then the perimeter is 20.2 miles...etc.The area doesn't tell you the perimeter.