Question

3. Find the area of square
(a) 18 cm​

Answer 1

Answer:  20.25cm

Step-by-step explanation:

If what I assume you mean by 18cm is the perimeter then you just have to divide 18 by 4 to get the length of one side, which is 4.5 as a square has all equal sides you times that by 4.5 Which gives you 20.25

Answer 2

Step-by-step explanation:

we know that area of a square

$area \: = a {}^{2}$

18 × 18= 324

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