From the information given in the question you may not assume that the shape is rectangular. It could, for example, be a isosceles triangle with sides of 7.3, 7.3 and 11.4 cm.
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Area = 289 sq cm so length of side = sqrt(289) = 17 cm Then perimeter = 4*side = 4*17 = 68 cm
6 cm * 10 cm
Well if what you are asking is whether you would use perimeter or area to measure a set amount of wallpaper the answer is area; e.g. 1 sq. ft. of wall paper
Any positive value upto 36 square units. A 6x6 square will have the maximum area of 36 sq units; a 5x7 rectangle will have an area of 35 sq units, and the area will be reduced as you reduce one of the measures and increase the other so that their sum remains 12 units so that the perimeter is 24 units. 1x11 will be 11 sq units 0.1x11.9 will be 1.19 sq units 0.01x11.99 will be 0.1199 sq units 0.001x11.999 will be 0.011999 sq units, etc.
14 cm