You can put this solution on YOUR website! suppose one leg of a 45-45-90 triangle is 5 units long. find the perimeter of the triangle.
----
The 2nd leg is 5 units long
---
Use Pythagoras to find the hypotenuse as 5*sqrt(2) units
----
Perimeter = 5 + 5 + 5sqrt(2) = 10 + 5sqrt(2)
==============================================
Cheers,
Stan H.
===========