Answer:
244.92mm
Step-by-step explanation:
if we say circumference=2*pi*r then we have circumference=2*3.14*39=244.92
so to find the circumferene the formula is pi r 2
a= 3.14 x 39 x 2
a= 244.92 (my teacher tells us to round it to the decimal place of the question, if your teacher says that too here's the answer 245mm)
sorry i took long i selpt while doin this
