• # question_answer Find the perimeter of the following figures: (a)             Perimeter = AB + BC + CD + DA             = .... cm + .... cm + .... cm + ....cm = .... (b)             Perimeter = AB + BC + CD + DA             = .... cm + .... cm + .... cm + .... cm = .... (c) Perimeter = AB + BC + CD + DE + EF + FG + GH + HI + IJ + JK + KL + LA =.... cm + .... cm + .... cm + .... cm + .... cm + .... cm + .... cm + .... cm + .... cm + .... cm + .... cm + .... cm = .... (d) Perimeter = AB + BC ­­+ CD + DE + EF + FA = .... cm + .... cm + .... cm + .... cm + .... cm + .... cm = .... Note: For finding the perimeter of any closed figure made up entirely of line segments, simply find the sum of the lengths of all the sides (which are line segments).

 (a) Perimeter $=AB+BC+CD+DA$ $=40\text{ }cm+10\text{ }cm+40\text{ }cm\text{ }+\text{ }10\text{ }cm$ $=100\text{ }cm$ (b) Perimeter $=AB+BC+CD+DA$ $=5cm+5cm+5cm+5cm$ $=20\text{ }cm$ (c) Perimeter $=AB+BC+CD+DE\text{ }+\text{ }EF$ $+FG+GH+HI+IJ+JK+KL+LA$ $=(1+3+3+1+3+3+1+3+3+1+3+3)\text{ }cm$ $=28\text{ }cm$ (d) Perimeter $=AB+BC+CD+DE+EF+FA$ $=100\text{ }m+120\text{ }m+90\text{ }m+45\text{ }m+60\text{ }m+80\text{ }m$ $=495\text{ }m$