Find the perimeter of the rectangle and squares of the previous problems 6 (iv).

6 (iv) O(0, 0), A(0, 7), B(–7, 7), C(–7, 0)

plot points O, A, B and C and join them as shown

As seen in the figure OABC is a rectangle

Length = CO = 7 cm

⇒ CO = 7 cm

Breadth = OA = 7 cm

⇒ OA = 7 cm

Perimeter of rectangle OABC = 2 × (length + breadth)

= 2 × (CO + OA)

= 2 × (7 + 7)

= 2 × 14

= 28 cm

Perimeter of rectangle ABCD = 28 cm