A shape is drawn on a one-centimetre grid - OCR - GCSE Maths - Question 5 - 2019 - Paper 1

To find the perimeter of the shape, we need to sum the length of all the outer edges.

1. The shape consists of four rectangles. Count the lengths of each side:

   • The top side of the main rectangle is 2 cm wide.
   • The two vertical sides on either end total 4 cm (2 cm on each side).
   • The bottom side is 4 cm wide (2 cm on each end and 2 cm in the middle).

2. Now, adding these lengths together:

   • Top side: 2 cm
   • Right vertical side: 2 cm
   • Bottom side: 4 cm
   • Left vertical side: 2 cm

   Thus, the total perimeter is:

   $P = 2 + 2 + 4 + 2 = 10$

   So, the perimeter of the shape is 10 cm.