<https://www.celeberrima.com/ejemplo-y-formula-perimetro-de-un-trapecio-isosceles/#listItem>
<http://schema.org/position>
"2"^^<http://www.w3.org/2001/XMLSchema#integer>
<https://www.celeberrima.com/ejemplo-y-formula-perimetro-de-un-trapecio-isosceles/>