How many ridges does a dime have around its edges?

I need to know the answer tonight. It is for school and my teacher told me to search for the answer.How many ridges does a dime have around its edges?
COIN


EDGE


NUMBER OF RIDGES





PENNY


SMOOTH


NONE





NICKEL


SMOOTH


NONE





DIME


RIDGES


118 RIDGES





QUARTER


RIDGES


119 RIDGES





HALF-DOLLAR


RIDGES


150 RIDGES





SUSAN B. ANTHONY DOLLAR


RIDGES


133 RIDGES





GOLDEN DOLLAR


SMOOTH


NONEHow many ridges does a dime have around its edges?
118
Eleven - Give or take six hundred.
Why don't you count them.....
118.... no i didn't count them... :)
i think 117. i may be rong. hope it is wright