An obtuse angled triangle.An obtuse angled triangle.An obtuse angled triangle.An obtuse angled triangle.
Any of the above: you can have a right-angled isosceles (not isoscles!) triangle, or an obtuse-angled one or an acute angled-one.
The angle sum of any triangle is 180 degrees. It does not matter whether it is equilateral, isosceles or scalene, nor whether it is acute angled, right angled or obtuse angled (or any permitted combination).
An obtuse angled triangle is wider than a right angled triangle. It has 180 degree angles.
It is an obtuse [angled] triangle.
An obtuse angled triangle.An obtuse angled triangle.An obtuse angled triangle.An obtuse angled triangle.
Any of the above: you can have a right-angled isosceles (not isoscles!) triangle, or an obtuse-angled one or an acute angled-one.
It is an obtuse angled isosceles triangle.It is an obtuse angled isosceles triangle.It is an obtuse angled isosceles triangle.It is an obtuse angled isosceles triangle.
The angle sum of any triangle is 180 degrees. It does not matter whether it is equilateral, isosceles or scalene, nor whether it is acute angled, right angled or obtuse angled (or any permitted combination).
An obtuse angled triangle is wider than a right angled triangle. It has 180 degree angles.
It is an obtuse angled triangle.
It is an obtuse [angled] triangle.
Any kind of triangle can have rational or irrational sides: acute angled, right angled or obtuse angled; equilateral, isosceles or scalene.
All isosceles triangles must have two congruent sides otherwise it is not isosceles. Whether it is acute angled, right angled or obtuse angled is irrelevant.
An obtuse angled triangle.
An obtuse angled triangle!
cannot because a triangle has to have 180 degrees i.e. obtuse angled triangle has one obtuse angle acute angled triangle has three acute angles