What exactly is 85 centimeter? The perimeter is the sum of all sides - in the case of the rectangle, this is the same as twice the width, plus twice the height. p = 2w+2h, or p = 2(w+h). If you only know that one side of the rectangle is 85 cm, you simply don't have enough information to calculate the perimeter.
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The dimensions of the rectangle will then work out as 14 cm by 10 cm because the perimeter is 14+10+14+10 = 48 cm
The perimeter of a 12 cm x 3 cm rectangle is 2*(12+3) cm = 2*15 cm = 30 cm.The perimeter of a 12 cm x 3 cm rectangle is 2*(12+3) cm = 2*15 cm = 30 cm.The perimeter of a 12 cm x 3 cm rectangle is 2*(12+3) cm = 2*15 cm = 30 cm.The perimeter of a 12 cm x 3 cm rectangle is 2*(12+3) cm = 2*15 cm = 30 cm.
28 cm
Area: 54 square cm Perimeter: 30 cm
The perimeter of a rectangle is calculated by adding up the lengths of all its sides. In this case, the rectangle is 4 cm long and 3 cm wide. Therefore, the perimeter would be 2(4 cm) + 2(3 cm) = 8 cm + 6 cm = 14 cm.