$37^{2} - 36^{2}$ = 73

18 cm, 19 cm, 20 cm

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18 cm, 25 cm, 32 cm

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Solution

The correct option is A
18 cm, 19 cm, 20 cm

Given : $37^{2} - 36^{2}$

We know that $(n + 1)^{2}$ - $(n)^{2}$ = (n+1) + n)

$\Rightarrow$ $37^{2} - 36^{2}$ = $(37 + 36)$

= 73

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