yes
It can have at most one obtuse angle.
One of them.
If one angle is a right angle, it is a right triangle. If one angle is an obtuse angle, it is an obtuse triangle. If there are no right nor obtuse angle then it is an acute triangle.
No. An obtuse angle is only one of several types of angles.
A triangle containing an obtuse angle is an obtuse triangle.
-- No right triangle, acute triangle, or equilateral triangle has an obtuse angle in it. -- If a triangle has an obtuse angle in it, then it's called an obtuse triangle. -- No triangle can have more than one obtuse angle in it .
obtuse triangle
140 degrees
an Obtuse triangle
An obtuse triangle.
An obtuse triangle
no