Not exactly. If I know the side lengths, I can still find the perimeter
You square-root the area
You cannot. For a given area, an equilateral triangle will have the smallest perimeter but that perimeter can be increased - without limit - without increasing the area.
If you know the area the divide area by length if you know perimeter subtract it by 2xlength and divide by 2
You have to add up all the sides of the shape.
It is impossible
Not exactly. If I know the side lengths, I can still find the perimeter
Divide the perimeter by 4 and then square the result to find the area of the square.
no
You square-root the area
You can find the perimeter of a rectangle if you know its area and the length of one side. Divide the area by the length of the known side and the quotient will be the length of a side perpendicular to the known side, and then multiply the sum of the two sides by two to find the perimeter.
You cannot. For a given area, an equilateral triangle will have the smallest perimeter but that perimeter can be increased - without limit - without increasing the area.
no
If you know the area the divide area by length if you know perimeter subtract it by 2xlength and divide by 2
You can't only using the perimeter. You have to know length and width.
Perimeter equals to 2 times the length plus 2 times the breadth. Area equals to length multiply by breadth
Only if you also know the shape and proportions. An equilateral triangle, for example.