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Question
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.
- Perimeter of rectangle ABCD = ______ cm.
- Perimeter of rectangle EFGH = ______ cm.
- Perimeter of square PQRS = ______ cm.
- Perimeter of rectangle STUV = ______ cm.
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Solution
1. Perimeter of a rectangle ABCD
= 2 × length + 2 × breadth
= 2 × 3.5 + 2 × 2.5
= 7 + 5
= 12 cm
2. Perimeter of a rectangle EFGH
= 2 × length + 2 × breadth
= 2 × 3.8 + 2 × 1.3
= 7.6 + 2.6
= 10.2 cm
3. The perimeter of a Square PQRS
= 4 × length of side
= 4 × 2.4
= 9.6 cm
4. The perimeter of a rectangle STUV
= 2 × length + 2 × breadth
= 2 × 3 + 2 × 2
= 6 + 4
= 10 cm
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