9514 1404 393
Answer:
A. trapezoid
Explanation:
The missing angle U is 86°, the value that makes the total be 360°. Then the top two angles total 180°, as do the bottom two angles. This means sides SV and TU are parallel, but sides UV and ST are not.
The figure has one pair of parallel sides, so is a trapezoid.
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A concave quadrilateral has a reflex angle. This figure does not.