Coin

How many 20-cent coins must be put in a row that the next 20-cent coins after them (above) rolled on its axis?

Correct answer:

n =  4

Step-by-step explanation:

120° + 60°(n2) + 120° = 360°  120+60(n2)+120=360  120+60 (n2)+120=360  60n=240  n=60240=4  n=4



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