# Parallelogram contains Point

**URL:** <https://forum.kirupa.com/t/parallelogram-contains-point/293684>\
**Category:** flash\
**Created:** [August 1, 2009, 3:59pm UTC](https://forum.kirupa.com/t/parallelogram-contains-point/293684 "2009-08-01T15:59:04Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![superpeppe](https://avatars.discourse-cdn.com/v4/letter/s/a183cd/32.png) [@superpeppe](https://forum.kirupa.com/u/superpeppe)\
**Post date:** [August 1, 2009, 3:59pm UTC](https://forum.kirupa.com/t/parallelogram-contains-point/293684/1 "2009-08-01T15:59:04Z")

</div>

Hi

What would be the fastest way to check whether a point P is inside a Parrallelogram(A, B, C, D). Please bare in mind that the Parrallologram could have vertical lines -\> slope=infinity.

Thanks in Advance 😃