question_answer

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

(a)

(b)

(c)

(d)

Answer:

(a)        Perimeter \[=4\times side\]

\[=4\times 25\text{ }cm\]

\[=100\text{ }cm\]

(b)        Perimeter \[=2\times (length+breadth)\]

\[=2\times (40\,\,cm+10\,\,cm)\]

\[=2\times 50\text{ }cm\]

\[=100\text{ }cm\]

(c)        Perimeter \[=2\times (length+breadth)\]

\[=2\times (30\,\,cm+20\,\,cm)\]

\[=2\times 50\text{ }cm=100\text{ }cm\]

(d)        Perimeter\[=30\text{ }cm+30\text{ }cm+40\text{ }cm\]

\[=100\text{ }cm\]

It is clear that all the figures have same perimeter of length 100 cm.