Every parallelogram and most trapezoids have.
Oh wait! It seems to me that every quadrilateral, regular or irregular, that's
not a rectangle and not concave, must have at least two obtuse angles.
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parallelograms, rhombuses, & hexagons
There are versions of quadrilaterals, pentagons and hexagons that have only two obtuse angles. If a shape with seven or more sides has two (or fewer) obtuse angles, it will also have at least one reflex angle and so will no longer be a convex polygon.
A certain type of a quadrilateral can have 3 obtuse angles providing that all of its 4 interior angles add up to 360 degrees
Yes. Two obtuse angles, of equal measure.Yes. Two obtuse angles, of equal measure.Yes. Two obtuse angles, of equal measure.Yes. Two obtuse angles, of equal measure.
A trapezium, a kite, a number of miscellaneous quadrilaterals.