If the radius of a circle is tripled, what happens with the circumference?

Answer 1

the circumference for a circle C=2π r

If you triple the radius, your new equation: C= 2π 3(r)

Pull that 3 into the front to see what's happening

C=3(2π r)

If you triple the radius, the circumference also triples because r and C are directly proportional.