An obtuse triangle or an isosceles triangle if the 2 acute angles are equal in size
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A trapezoid has 4 sides, 2 acute and 2 obtuse angles, and only one pair of parallel sides
4
parallelogram
polygon
With 4 angles it will be a quadrilateral. Depending upon which angles are acute and which are obtuse and their sizes, and the side lengths it could be:a general quadrilaterala parallelograma rhombusa trapeziuma kite