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.
No. It is not possible to make a equilateral triangle that is obtuse.
Yes it is possible to have a obtuse scalene triangle.
Yes, its not possible to have a "right obtuse triangle"
no
The definition of an obtuse triangle is a triangle with an angle exceeding 90o. A scalene triangle is a triangle in which no two sides are of equal length. Therefore, it is possible that an obtuse triangle is a scalene triangle. However, it is also possible for an obtuse triangle to be an isosceles, in which two sides are of equal length. On a final note, it is impossible for an obtuse triangle to be an equilateral; equilateral triangles always have angles of 60o.
yes
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".
yes
no
No
Yes, but only one angle will be obtuse.
No, those three examples cover all possible cases. If it is a triangle, then it is either acute, right, or obtuse.