Answer
$\sqrt{7}+\sqrt{13}+\sqrt{6}\; cm$.
Work Step by Step
Perimeter of the triangle is equal to the sum of all sides.
The sides of the given triangle is $\sqrt{7}\; cm,\sqrt{13}\; cm$ and $\sqrt{6}\; cm$
Add all sides.
$=\sqrt{7}+\sqrt{13}+\sqrt{6}$
No further simplification possible.
Hence, the perimeter is $\sqrt{7}+\sqrt{13}+\sqrt{6}\; cm$.