Answer :
The radius of a circle is a line that goes from any point on the circle's circumference to its center. See the attached images.
![View image sissyrose](https://us-static.z-dn.net/files/dfc/a6eff1999dfabca94437d0bc467e3c39.gif)
![View image sissyrose](https://us-static.z-dn.net/files/de0/b78ed9ee5dcba0f55e853afd52c04c06.gif)
Th radius of a circle is a straight line drawn from the center to the extreme edge of a circle hope it helped