a diamond does. There are two obtuse angles in it.
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a parelelogram
A general quadrilateral or a kite.
An obtuse triangle has 3 sides.
The shape can only be a rectangle! A rectangle is a four-sided 2-dimentional figure, where every angle is a right angle, opposite sides are parallel, but the 4 sides are NOT equal.
If x is acute, then x < 90 and -x > -90. Adding 180 to both sides, 180-x > 90, i.e. the supplement of x is obtuse.