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2.Which of these rectangles has the longest perimeter?, , Ans. Perimeter of rectangle measuring 1 x 12 cm, , = 2 (length + breadth), , =2(1+12), , =2x13= 26cm, , Perimeter of rectangle measuring 2x6 cm = 2 (length + breadth), =2(2+6), , = 2x8 = 16cm, , Perimeter of rectangle measuring 3x4 cm = 2 (length + breadth), = 2(3 +4), , =2x7=14cm, , Hence, the rectangle measuring 1 x 12 cm has the longest perimeter., 3.Which of these rectangles has the smallest perimeter?, , Ans. The rectangle measuring 3 x 4 cm has the smallest perimeter.