Evaluate, correct to one place of decimal, the expression $\dfrac{5}{\sqrt{20} - \sqrt{10}}, \text{ if } \sqrt{5} = 2.2 \text{ and } \sqrt{10} = 3.2$

If x = $\sqrt{3} - \sqrt{2}$, find the value of :

(i) $x + \dfrac{1}{x}$

(ii) $x^2 + \dfrac{1}{x^2}$

(iii) $x^3 + \dfrac{1}{x^3}$

(iv) $x^3 + \dfrac{1}{x^3} - 3\Big(x^2 + \dfrac{1}{x^2}\Big) + x + \dfrac{1}{x}$

Draw a line segment of length $\sqrt{3}$ cm.

Draw a line segment of length $\sqrt{8}$ cm.