# Get rotation angle from matrix

**URL:** <https://forum.kirupa.com/t/get-rotation-angle-from-matrix/331269>\
**Category:** flash\
**Created:** [June 25, 2013, 7:00pm UTC](https://forum.kirupa.com/t/get-rotation-angle-from-matrix/331269 "2013-06-25T19:00:48Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Tompa](https://avatars.discourse-cdn.com/v4/letter/t/6de8d8/32.png) [@Tompa](https://forum.kirupa.com/u/Tompa)\
**Post date:** [June 25, 2013, 7:00pm UTC](https://forum.kirupa.com/t/get-rotation-angle-from-matrix/331269/1 "2013-06-25T19:00:48Z")

</div>

I got this matrix\*:\*

```auto
a="0.898834228515625" b="0.438278198242188" c="-0.438278198242188" d="0.898834228515625"

```

How can I get the rotation angle out from this?

Thanks in advance,  
_~Tompa_