Respuesta :

See also
https://brainly.com/question/8861591

Short Side : Long Side is the same for all triangles
.. a/20 = 20/21
.. a = 400/21

Hypotenuse : Long Side is the same for all triangles
.. b/20 = 29/21
.. b = 580/21

The 1st selection is appropriate.
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