![geometry - Why the perimeter of a ring is $2\pi(R+r)$ and not $2\pi(R-r)$ ? where $R$ is the bigger circle radius and $r$ is smaller circle radius - Mathematics Stack Exchange geometry - Why the perimeter of a ring is $2\pi(R+r)$ and not $2\pi(R-r)$ ? where $R$ is the bigger circle radius and $r$ is smaller circle radius - Mathematics Stack Exchange](https://i.stack.imgur.com/Zd3AN.png)
geometry - Why the perimeter of a ring is $2\pi(R+r)$ and not $2\pi(R-r)$ ? where $R$ is the bigger circle radius and $r$ is smaller circle radius - Mathematics Stack Exchange
![the inner and outer circumference of a circular ring is 44cm and 88cm find the width of the ring - Maths - Perimeter and Area - 12316061 | Meritnation.com the inner and outer circumference of a circular ring is 44cm and 88cm find the width of the ring - Maths - Perimeter and Area - 12316061 | Meritnation.com](https://s3mn.mnimgs.com/img/shared/ck-files/ck_5867d68e039a0.png)
the inner and outer circumference of a circular ring is 44cm and 88cm find the width of the ring - Maths - Perimeter and Area - 12316061 | Meritnation.com
![calculate the area and perimeter of the following ring where a=7cm and b=14cmplease tell me - Brainly.in calculate the area and perimeter of the following ring where a=7cm and b=14cmplease tell me - Brainly.in](https://hi-static.z-dn.net/files/d04/0a90b22b154914762d5fb64bd8e72940.jpg)
calculate the area and perimeter of the following ring where a=7cm and b=14cmplease tell me - Brainly.in
![Set Round with Different Thickness Perimeter Outline, Vector Circle Washer Design Element Circle, Round, Lap Ring Stock Vector - Illustration of design, scribble: 184296018 Set Round with Different Thickness Perimeter Outline, Vector Circle Washer Design Element Circle, Round, Lap Ring Stock Vector - Illustration of design, scribble: 184296018](https://thumbs.dreamstime.com/z/set-round-different-thickness-perimeter-outline-vector-circle-washer-design-element-lap-ring-184296018.jpg)
Set Round with Different Thickness Perimeter Outline, Vector Circle Washer Design Element Circle, Round, Lap Ring Stock Vector - Illustration of design, scribble: 184296018
![Consider a ring of radius R with the total charge Q spread uniformly over its perimeter. What is the potential difference between the point at the center of the ring and a Consider a ring of radius R with the total charge Q spread uniformly over its perimeter. What is the potential difference between the point at the center of the ring and a](https://homework.study.com/cimages/multimages/16/imgpsh_fullsize_anim5141257645676270017.jpg)