Question

the side length of a square with an area of 19 square units is 19 square root. The 19 square roots is an irrational number between 4 and 5 explain why the value is between 4 and 5

Answer 1

$\text{We know}\ \sqrt{a}=b\ if\ b^2=a\\\\4 < \sqrt{19} < 5\ \text{because}\\\\4^2 < (\sqrt{19})^2 < 5^2\\\\16 < 19 < 25\to\sqrt{16} < \sqrt{19} < \sqrt{25}$