Here, We will determine the sides first of all
We are assuming that 1 block measures 1cm. So, According to this assumption the number of blocks the side covers is equal to the length of that side (in cm)
[tex]\rule{300pt}{3pt}[/tex]
The sides are; 2cm, 4cm, 2cm, 4cm, 7cm, 3cm
Now,
[tex] \sf \longmapsto perimeter = Sum \: of \: all \: sides[/tex]
Putting values of sides;
[tex] \sf \longmapsto 2 + 4 + 2 + 4 + 7 + 3[/tex]
[tex] \sf \longmapsto Perimeter=22cm[/tex]
