Question

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Answer 1

perimeter of square = 4×side

1. 4×12 = 48
2. 4×7.5 = 30
3. 4×18 = 72

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Answer 2

Answer:

a. The perimeter of a square having side 12 cm is 48 cm.

b. The perimeter of a square having side 7.5dam is 30,000 cm or 30dam .

c. The perimeter of a square having side 18hm is 720000 cm or 72 hm

Step-by-step explanation:

Given -

Side of square

a. 12 cm

b. 5 dam

c. 18 hm

To find -

The perimeter of a square

Solution -

As we know that

The perimeter of a square = $4 a$

Where

a = side of square

In square all the sides are equal.

a. 12 cm

Side of square (a)= $12$ cm

The perimeter of a square = $4\times 12$

The perimeter of a square = $48 cm$

The perimeter of a square having side 12 cm is 48 cm.

b. 7.5 dam

dam means decameter.

To convert dam to cm multiply the length value by 1000 .

$7.5 \:dam = 7.5 \times 1000 = 7500 \: cm$

Side of square (a)= $7500$ cm

The perimeter of a square = $4\times 7500$

The perimeter of a square = $30000$ cm

The perimeter of a square having side 7.5dam is 30,000 cm or 30dam .

c.18 hm

hm means hectometer.

To convert hm to cm multiply the length value by 10000 .

$18\:hm= 18\times 10000 =180000\:cm$

Side of square (a)= $180000$ cm

The perimeter of a square = $4\times 180000$

The perimeter of a square = $720000$ cm

The perimeter of a square having side 18hm is 720000 cm or 72 hm