No - simply because a 'reflex' angle (I think that's what you meant) is more than 180 degrees, and an obtuse angle is between 90 and 180 degrees.
Yes.
Yes if they are right angles
A rectangle has no interior obtuse angles.
Two angles are adjacent if they have the same vertex, share a side and do not overlap. It is, therefore, perfectly possible for two obtuse angles to be adjacent. In fact, every pair of adjacent angles in a hexagonal tessellation (a honeycomb, for example), consists of a pair of obtuse angles (120 degrees).
There are no angles they are all obtuse angles
It depends on they type of arrowhead you have. If it is a arrowhead in the shape of a directional arrow, there are no obtuse angles. The most possible obtuse angles is 1.
Triangles do not have to have any obtuse angles but they can have one.
yes
Yes.
No.
Yes if they are right angles
yes its a trapezoid
Yes
No, a trapezoid cannot have two obtuse angles. By definition, a trapezoid has exactly one pair of parallel sides. If it had two obtuse angles, it would imply that both pairs of opposite angles are obtuse, which is not possible as one pair of opposite angles must be acute in a trapezoid.
show the drawing
If by equilangular you mean all angles are the same, then no - the sum of the angles of a triangle must be 180o, so if all 3 are the same they must each be 60o and the triangle is called equilateral. However, an obtuse isosceles triangle is possible as the equal angles are the other two angles to the obtuse angle.
In normal geometry, it's not possible to make a triangle with two obtuse angles. It is possible to make a triangle with two obtuse angles in spherical geometry -- it's a kind of "spherical triangle". It is possible to make a triangle with two obtuse angles in some kinds of non-Euclidean geometry -- it's a kind of "non-Euclidean triangle".