Respuesta :

First of all, we know that the two angles are 90 degrees each. That means that the other two angles are also 90 degrees each 
(rectangle = 360 degrees total)

This means that the two sides (Side FG and Side EH) are congruent.
That means that the sides EF and GH are also congruent.
This shape is a rectangle 

Hope this is gonna help at least a bit ;)

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