A tessellation is the regular t<span>iling of a plane shape</span>
The perimeter of a Pentagon is all the length of the sides added up
A pentagon is a five sided shape
so...
900+900+900+900+900
or 900*5
That is 4500.
The perimeter of the Pentagon Building in Washington DC, whose side is 900 feet long, is 4500 feet around.
Hope this helps :)
.6/1.0 = 6/10
3 6/10 or 3 3/5