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The diagonal is 26cm
40cm2
10 × 5 = 50Therefore, the width is 5 centimetres.
The perimeter of a rectangle is calculated by adding together the lengths of all its sides. In this case, the rectangle has two sides of length 10cm and two sides of length 3cm. Therefore, the perimeter is calculated as 10cm + 10cm + 3cm + 3cm = 26cm.
area = length x width area = 12 x 10 = 120 square cm