Before posting here, I read these three posts:
"For answers, any post that is not an answer (should be a comment, doesn't answer the question, etc.) should be deleted. Answers that are wrong or that dispense poor advice should be downvoted, not deleted."
Can I see my own answer's deletion reason? (My answer has no comment or reason given for deletion that I can see)
What to do when my answer was supposed to be only an alternative to another one, but outvotes it? My answer was in the spirit of what is described here, only that it was not more complicated, but a VERY educational and useful way to get the right answer with a different mathematical path - leading to better overall understanding for students.
My request for help
My deleted answer is here (not sure if you can see it): A circle, a square, and an equilateral triangle had the same area. If their perimeters represent their ages, who are the oldest and the youngest?
It definitely answers the question, so should not be deleted.
Also, I think it adds correct mathematical understanding, and teaches looking for less obvious ways to get an answer to a question. The answer is not wrong, and in my opinion it does not dispense poor advice, but that can be subjective - but should only lead to downvotes at worst, according to the rules here.
I would like it undeleted, and ideally some comments from downvoters and for others who are good at math to consider upvoting.
Background
I have been involved over the years on a few stackexchange sites, off and on, and have over 100 reputation on some of them, so I'm not a troll. I happened to see this question linked on the RHS of the screen, and thought I'd contribute an outside-the-box thinking answer, as someone well educated in mathematics. As it is a different branch under SE, I had to join as a noob.
I find it disconcerting that 3 people with enough power simply deleted it with no explanation - very quickly it seems. Based on what I quoted above, I don't think the answer meets the criteria for deletion at all - in fact I don't think it even meets the criteria for downvoting!
The rules say that other people with equivalent power could undelete it. But I don't see any kind of button or feature to let me "submit for review", or find such people with this power to have a look and decide how to vote. Is there a way, or if not, could we consider this a new feature?
(edit: this last section seems to be answered by the link that showed up at the top of this page which is pointed to by the "duplicate" tag. Even though it's not a duplicate, it does seem to ANSWER my question of HOW one would ask for a review - thank you! The only problem is that due to the unfair deletion of my post, I don't have enough reputation to follow the procedure to get the review of the unfair deletion of my post)