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You need more information for an exact solution. As stated, there are an infinite number of solutions. For example, 6+6+4+4 or 7+7+3+3 or 8+8+2+2. Typically information is given about the relationship of the long and short sides in order to solve for the lengths of the sides. Since there are two unknowns, you need to have two sets of information (or equations) to solve.
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What is the perimeter of a rectangle width is 20cm the length is 8cm?
Perimeter = 20+8+20+8 = 56 cm.....
Can you show a rectangle with an area of 20cm square and 18cm perimeter?
The dimensions of the rectangle are 5 cm by 4 cm
What is the perimeter of a rectangle that is 20cm by 2cm which has a quarter circle of radius 11cm on one 20cm side running off the 2cm side using 3.14 for π?
Normally, the amount of the side of the rectangle below the quarter circle on it would expected to be calculated. However, the radius of the circle equals the amount that is subtracted, but in calculating the perimeter it has to be added back in again as it forms part of the perimeter. Thus the perimeter is the perimeter of the rectangle plus a quarter of the circumference of the circle. → perimeter = 2 × (20cm + 2 cm) + ¼ × 2 × π × 11 cm ≈ 44 cm + 3.14 × 11/2 = 61.27 cm.
What is the area of a trapezoid if the perimeter is 32?
Unlike a square, knowing the perimeter of a trapezoid is not enough to be able to calculate its area. Think of a rectangle with a perimeter of 20cm. One possibility is that it has a length of 8cm and a width of 2cm. This would give and area of 16cm2. However the rectangle could have also had a length of 7cm and a width of 3cm as this would also give a perimeter of 20cm. However this rectangle now has an area of 21cm2. To be able to calculate the area of the trapezoid, you would need to know more about it than just its perimeter.
What is the perimeter of a rectangle that has an area of 18?
That depends on the dimensions !... A 1 x 18 rectangle has a perimeter of 38 ! A 2 x 9 rectangle has a perimeter of 22 ! A 3 x 6 rectangle has a perimeter of 18 !
