Yes. It is a false sentence but a sentence all the same.
You are all I need...all.
All that is perfectly managed ends up well.
All people deserve equal rights.
"All animals are equal, but some animals are more equal than others"
for
All multiples of even numbers will equal an even number.
If all the names are equal e.g. 7, then the lowest number = the highest number = the mean etc. = 7.
i can see matted in a sentence it is have to be all capital latter and ends with a periodMatted is used as an adjective : The cat's fur was matted with mud .
The six wives of Henry VIII all met unfortunate ends.
I am the caitiff that do hold him to't;" Shakespeare. All's well that ends well.
A dodecagon can be drawn by drawing a polygon with 12 sides and 12 angles. All sides and angles have to be equal. * * * * * The first sentence is correct, the second is utter nonsense. There is no reason for a dodecagon - or a polygon with any number of sides - to have equal sides or equal angles.