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
The shape you are describing is a trapezoid. A trapezoid is a quadrilateral with at least one pair of parallel sides. It can have two right angles, but it does not have any lines of symmetry due to its asymmetrical nature.
Four SIdes