Question

find the area and perimeter of ractangle breadth= root 2 and lenght = root 8

Answer 1

$length = \sqrt{8} = \sqrt{2 \times 2 \times 2} = 2 \sqrt{2} \\ breadth = \sqrt{2} \\ area = l \times b \\ = 2 \sqrt{2} \times \sqrt{2} = 2 \times 2 = 4 \: sq \: unit \\ \\ perimeter = 2(l + b) \\ 2(2 \sqrt{2} + \sqrt{2}) \\ = 2 \times 3 \sqrt{2} \\ 6 \sqrt{2} \: unit$