If the radius is halved, then, what is the change in its circumference

1.	If the radius is halved, then, what is the change in its circumference?
Answer» If the radius is r, then its circumference of the circle is 2πr. If radius is halved means r = \(\frac{r}{2}\) (new) Write r = \(\frac{r}{2}\) in 2πr. Then, the circumference = 2π x \(\frac{r}{2} = \frac{1}{2}\) 2πr Circumference is halved. So if the radius of a circle is halved, then the circumference is also halved.

If the radius is halved, then, what is the change in its circumference?

Answer»

If the radius is r, then its circumference of the circle is 2πr.

If radius is halved means r = \(\frac{r}{2}\) (new)

Write r = \(\frac{r}{2}\) in 2πr.

Then, the circumference = 2π x \(\frac{r}{2} = \frac{1}{2}\)

2πr

Circumference is halved.

So if the radius of a circle is halved, then the circumference is also halved.