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How do you find the length and width if you know the perimeter?
Length + width = half of perimeter, so you need more information...
Which quadrilateral will give you the greatest area for the least perimeter?
A square will. The only shape that can enclose more area with the same perimeter is a circle.
What is the perimeter for a polygon that's area is 20sq. units?
Even if you knew how many sides the polygon has, you stillcould not calculate its perimeter with that much information.Examples:-- An equilateral triangle with area of 20 has perimeter of 20.3885 .-- A square with area of 20 has perimeter of 17.889(rounded).-- A rectangle with area of 20 can have any perimeter more than 17.889 .4 by 5 . . . . area = 20, perimeter = 182 by 10 . . . area = 20, perimeter = 241 by 20 . . . area = 20, perimeter = 42..etc.
Is it sometimes always or never true that the perimeter of a rectangle is numerically greater than its area?
Sometimes. Experiment with a small square and with a large square (though any shape rectangle will do). A square of 4 x 4 has a perimeter of 16, and an area of 16. A smaller square has more perimeter than area. A larger square has more area than perimeter.
What are the dimensions of a rectangle whose perimeter is cm if its length is 2 cm more than thrice its width?
You forgot to put in the length of the rectangle's perimeter.
