# Tween a radius to outside of circle

**URL:** <https://forum.kirupa.com/t/tween-a-radius-to-outside-of-circle/300160>\
**Category:** Uncategorized\
**Created:** [November 17, 2009, 12:43am UTC](https://forum.kirupa.com/t/tween-a-radius-to-outside-of-circle/300160 "2009-11-17T00:43:47Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![libman](https://avatars.discourse-cdn.com/v4/letter/l/50afbb/32.png) [@libman](https://forum.kirupa.com/u/libman)\
**Post date:** [November 17, 2009, 12:43am UTC](https://forum.kirupa.com/t/tween-a-radius-to-outside-of-circle/300160/1 "2009-11-17T00:43:47Z")

</div>

Hi folks,

I am no master of Flash. I was wondering if there was a way to tween the radius of a circle to be placed on the circumference of the circle. I want a student to see the radius being transformed to a curve and then placed on the circle. I will be teaching my students the concept of a radian.

![](http://forum.kirupa.com/uploads/kirupa/5947/be1c25e43e5aa982.gif)

Thanks,  
Libman