Because a perimeter is measured in linear units while an area is measured in square units.
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A perimeter is not enough to determine the area. It depends on the shape. The shape has the greatest area if it is a circle and then the area will be 143.73 square units (approx). If it a square, the area will be 112.890625 sq units. But the area can be reduced, without limit, by making the shape longer and thinner. For example, 20*1.25 rectangle: area = 25 sq units 21*0.25 rectangle: area = 5.25 sq units 21.2*0.05 rectangle: area = 1.06 sq units 21.24*0.001 rectangle: area = 0.2124 sq units etc
The perimeter (measured in cm) is the length around so you would just add 144 + 162 + 144 + 162. The area (measured in sq. cm) is how much the surface covers. It is just multiplying 144 x 162.
Perimeter = 4 x length32 = 4 x lengthLength = 8 unitsArea = (length)2Area = 82Area = 64 sq units
37 * * * * * No. Total surface area = Lateral area + 2*base area = 10*3 + 2*7 = 30 + 14 = 44 sq units.
Further information is needed to provide an answer to this question. If the area is 140 sq units, then this could be formed from a rectangle 1 unit wide by 140 units long - giving a perimeter of 2 x 140 + 2 x 1 = 282 units. But, the rectangle could be 14 units wide and 10 units long giving a perimeter of 2 x 14 + 2 x 10 = 48 units.