Respuesta :

Answer:

6.7

Step-by-step explanation:

Given is a right angled triangle.

So by Pythagoras theorem:

Length of the third side

[tex] = \sqrt{ {7}^{2} - {2}^{2} } \\ \\ = \sqrt{49 - 4} \\ \\ = \sqrt{45} \\ \\ = 6.70820393 \\ \\ \approx 6.7[/tex]