Question

Estimate the square root of each of the following (a) 21 ​

Answer 1

Answer:

4.5825

Explanation:

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Answer 2

Explanation:

$\sqrt{21}$

$nearest \: square \: no \: is \: 16$

$so \: \sqrt{16} = 4$

$the \: next \: sq \: no \: after \: 21 \: is = 25$

$so \: \sqrt{25} = 5$

$therefore \: \sqrt{21} will \: be \: between \: 4 \: and \: 5$