We can't find the perimeter if we don't know the length of the sides. Anyway, just add the lengths of all sides, that's how you find perimeter.

# Find The Perimeter Of Each Triangle To The Nearest Centimeter. This Is Third Grade Math What Is The Perimeter? What Is An Centimeter?

A centimeter is a unit used for measuring distance. It is one hundredth of a meter. A meter is very roughly 10% longer than a yard. A centimeter is very roughly 4/10 of an inch. Metric units and their conversions can be found here.