It's 2 times.
A coin rolls in the interior of a square along its sides without slipping. When the coin has returned to its starting position, it has made 1 whole revolution. If the coin’s radius is 1, what is the side length of the square?
The coin on the left is rolled, without slipping, halfway around the coin on the right. Will the coin be upside down?
A coin of diameter 1 cm. is rolling on the periphery circle of diameter 24 cm, how many rounds will this coin need to revolve to complete one full big circumference?
A tosses a fair coin 50 times. B tosses another fair coin 51 times. What is the probability that B got more heads than A?
