No, it isn't. The term Hypotenuse is associated with right triangles. It is the longest side of the triangle, opposite the right angle.
The longest side of a triangle is called the hypotenuse, but this term specifically applies to right triangles. In general triangles, the longest side is simply referred to as the longest side. In any triangle, the longest side is opposite the largest angle.
A hexagon has six sides, each of which can be considered as a base for a right triangle. In a right triangle, the side opposite the right angle is the hypotenuse. Therefore, a hexagon has six hypotenuses, one for each of its sides.
The term "obtuse" refers to an angle greater than 90 degrees but less than 180 degrees, not the number of sides of a shape. Therefore, it doesn't have a specific number of sides associated with it. Shapes can have any number of sides and still contain obtuse angles. For example, a triangle can have one obtuse angle, while a quadrilateral can have multiple obtuse angles.
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.
obtuse mean greater than 90
The term for two triangles that are congruent after a dilation is similar.
They are similar triangles.
Pythagoras
Such triangles are similar.
Some triangles can be classified by only term, and some triangles fall into two overlapping, non-mutually-exclusive categories.
Similar
obtuse (130 is greater than 90)