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Question

Mathematics Question on Perimeter

Find the perimeter of each of the following figures :
List of figures

Answer

(a) Perimeter=Sum of all the sides =4  cm+2  cm+1  cm+5  cm\text{Perimeter} = \text{Sum of all the sides }= 4 \;cm + 2 \;cm + 1 \;cm + 5 \;cm
=12  cm=12 \;cm


(b) Perimeter=Sum of all the sides=23  cm+35  cm+40  cm+35  cm\text{Perimeter} = \text{Sum of all the sides} = 23 \;cm + 35\; cm + 40 \;cm + 35 \;cm
=133  cm= 133\; cm


(c) Perimeter=Sum of all the sides =15  cm+15  cm+15  cm+15  cm\text{Perimeter} = \text{Sum of all the sides }= 15 \;cm + 15\; cm + 15 \;cm + 15 \;cm
=60  cm= 60 \;cm


(d) Perimeter=Sum of all the sides =4  cm+4  cm+4  cm+4  cm+4  cm\text{ Perimeter} = \text{Sum of all the sides }= 4 \;cm + 4 \;cm + 4 \;cm + 4 \;cm + 4 \;cm
=20  cm= 20 \;cm


(e) Perimeter=Sum of all the sides\text{Perimeter} = \text{Sum of all the sides}
1ˉ  cm+4  cm+0.5  cm+2.5  cm+2.5  cm+0.5  cm+4  cm=15  cm\\\=1 \;cm + 4 \;cm + 0.5\; cm + 2.5\; cm + 2.5\; cm + 0.5\; cm + 4 \;cm = 15 \;cm


(f) Perimeter=Sum of all the sides\text{Perimeter} = \text{Sum of all the sides}
=4  cm+1  cm+3  cm+2  cm+3  cm+4  cm+1  cm+3  cm+2  cm+3  cm+4  cm+1  cm+3  cm+2  cm+3  cm+4  cm+1  cm+3  cm+2  cm+3  cm= 4 \;cm + 1 \;cm + 3 \;cm + 2\; cm + 3 \;cm + 4\; cm + 1 \;cm + 3\; cm + 2 \;cm + 3 \;cm + 4 \;cm + 1 \;cm + 3 \;cm + 2 \;cm + 3 \;cm + 4 \;cm + 1 \;cm + 3 \;cm + 2 \;cm + 3 \;cm
=52  cm= 52 \;cm