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.
Irregular Rhombus
a parelelogram
Yes
this shape would be a rhombus
It could be a trapezoid having 2 right angles, an obtuse angle and an acute angle
0
A trapezoid can have 2 right angles, 1 acute angle and 1 obtuse angle that all add up to 360 degrees and it has a pair of parallel sides.
No, because none of its 3 sides are parallel
A general quadrilateral or a kite.
pentagon
Four SIdes
a trapezium