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Look at the figures on the sheet of graph paper. Measure their sides with the help of the lines on the graph paper. Write the perimeter of each in the right box.

(1) Perimeter of rectangle ABCD 

= [ ] cm

(2) Perimeter of rectangle EFGH 

= [ ] cm

(3) Perimeter of square PQRS 

= [ ] cm

(4) Perimeter of rectangle STUV 

= [ ] cm

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(1) Perimeter of a rectangle ABCD

= 2 x length + 2 x breadth 

= 2 x 3.5 + 2 x 2.5 

= 7 + 5 

= 12 cm

∴ 12 cm

(2) Perimeter of a rectangle EFGH 

= 2 x length + 2 x breadth 

= 2 x 3.8 + 2 x 1.3 

= 7.6 + 2.6 

= 10.2 cm

∴ 10.2 cm

(3) Perimeter of a rectangle PQRS

= 2 x length + 2 x breadth 

= 2 x 2.4 + 2 x 2.4 

= 4.8 + 4.8 

= 9.6 cm 

∴ 9.6 cm

(4) Perimeter of a rectangle STUV 

= 2 x length + 2 x breadth 

= 2 x 3 + 2 x 2 

= 6 + 4 

= 10 cm 

∴ 10 cm

(5) Perimeter of a triangle LMN 

= 1.5 + 2.5 + 2 

= 6 cm 

∴ 6 cm

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