Answer:
No, they are not similar as they do not fulfil the similarity statement SSS.
Step-by-step explanation:
I'll solve this in a mathematical method so you know why!
For two triangles to be similar, they need to have the same angles and/or the same ratios for their sides.
In this case, we have no angles so we have to focus on the side ratio (SSS).
To make things easier to compare, I have attached a screenshot of a very disproportionate sketch below to outline the two triangles LMO and OMN. I drew the base as Line OM for ease.
Now to determine the ratios, let's start with LMO; I'll format this in the ratio:

Now we determine the ratio of OMN:

For the ratios to be similar the middle section of the ratio (Line OM) must be the same number as they have they share it. Hence, they are not similar!
Hope this helps!!!