Question

What is the perimeter of each of the following figures? What do you infer from the answers?

Answer 1

(a) $\text{Perimeter of square }= 4 \times side$
= $4 \times 25 = 100$ $cm$

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(b) $\text{Perimeter of rectangle} = 2 \times (length + breadth)$
= $2 \times (40 + 10)$
= $2 \times 50 = 100$ $cm$

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(c) $\text{Perimeter of rectangle }= 2 \times (length + breadth)$
= $2 \times (30 + 20)$
= $2 \times 50 = 100$ $cm$

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(d) $\text{Perimeter of triangle} = \text{Sum of all sides}$
= $30\; cm + 30 \;cm + 40\; cm$
= $100$ $cm$

Thus, all the figures have same perimeter.