Question

Two legs of a right triangle are 8 cm and 15 cm long. Find the length of the hypotenuse of the triangle.

Answer 1

$$\begin{gathered} \text{Since it is a right triangle, by using the Pythagoras theorem:} \\ \begin{array}{l}\text{Length of the hypotenuse}=\sqrt{8^2+{15}^2}\\ =\sqrt{64+225}\\ =\sqrt{289}\\ =\pm 17\text{cm}\\ \end{array} \\ \text{The length of the side can not be negative.} \\ \therefore \mathrm{Length}\mathrm{of}\mathrm{the}\mathrm{hypotenuse}=17\mathrm{cm} \end{gathered}$$