It is not entirely clear what the question is about. The sum of the angles of a triangle on a plane surface is 180 degrees. However, on a concave surface, such as the inside of a dome, they will add to less than that and, at the appropriate curvature, they will sum to 145 degrees.
They are obtuse triangles which will also have 2 acute angles and the 3 interior angles will add up to 180 degrees
Obtuse angle may be the term you are looking for.
The supplementary angle to a 145 degree angle will be a 35 degree angle because 145 + 35 = 180.
No
The supplement of a 35 degree angle would be 145 degree angle.
All right angle triangles
90 degree triangles are always similar.
Right triangles - those with a 90-degree angle.
13
The supplementary angle to a 145 degree angle will be a 35 degree angle because 145 + 35 = 180.
Those triangles with 25 and 90 degree angles are called right angle triangle.
acute triangles
No
In a perfect star, the triangles have two 72 degree angles and one 36 degree angle.
depends on what size triangles and what kind of triangles?
They can be any kind of triangles.
It has 16 sides and contains 14 triangles
Unlimited - you need one 90-degree angle, and the other two can be anything that add up to 90!
No.