Question

find the perimeter of shapes given below is equal to
1 cm × 1 cm​

Answer 1

Answer:

1) Since the 1st one is a square the perimeter will be

= 4× side

=4×3

=12 cm

2) This one is also a square so...

=4×side

=4×2

=8cm

3) As this shape is a rectangle... l= 4cm, b= 3cm

= 2(l+b)

=2 (4+3)

= 2(7)

= 14cm

Answer 2

Given,

The length of a side of a square$\[ = 1{\rm{cm}}\]$

Solution,

In figure(1), there are three squares on the length side and three squares on the breadth side.

Therefore, the perimeter is

$\[\begin{array}{l} = 4 \times 3 \times 1\\ = 12cm\end{array}\]$

In figure(2), there are two squares on the length side and two squares on the breadth side.

Therefore, the perimeter is

$\[\begin{array}{l} = 4 \times 2 \times 1\\ = 8cm\end{array}\]$

In figure(3), there are four squares on the length side and three squares on the breadth side.

Therefore, the perimeter is

$\[\begin{array}{l} = \left( {4 \times 1} \right) + \left( {3 \times 1} \right)\\ = 4 + 3\\ = 7cm\end{array}\]$

Hence, the perimeter of figures (1), (2) and (3) are$\[12{\rm{cm}},8{\rm{cm}}\,{\rm{and}}7{\rm{cm}}\]$ respectively.