2 * 9 cm + 2 * 4 cm = 18 cm + 8 cm = 26 cm
or 9+9+4+4=26cm
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The perimeter of a rectangle is calculated by adding the lengths of all its sides. In this case, the rectangle measures 9 cm by 4 cm. Therefore, the perimeter would be 2(9) + 2(4) = 18 + 8 = 26 cm.
22 cm
Pentagon means five sides. If one side is 4cm, then the perimeter which is the total length of all the sides is 4cm multiplied by 5 equals to 20 cm.
Length + width = half of perimeter, ie 18 cm. 18 - 4 = 14, 14/2 = 7 so sides are 7 and 11 cm and area = 77sq cm
Perimeter of rectangle = 2 x ( L + W ) = 2 x 64 = 128 cm. or Perimeter of rectangle = 2L + 2W = 68 + 60 = 128 cm.
The length could be 3 cm (width = 1 cm), with a perimeter of 8 cm, which is not more than 72 cm. Or it could be 6 cm (w = 2 cm, perimeter = 16 cm).