No, it isn't. The term Hypotenuse is associated with right triangles. It is the longest side of the triangle, opposite the right 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.
obtuse mean greater than 90
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.
The term for two triangles that are congruent after a dilation is similar.
They are similar triangles.
Such triangles are similar.
Pythagoras
Some triangles can be classified by only term, and some triangles fall into two overlapping, non-mutually-exclusive categories.
Similar
Which term is associated with logical addressing?
What is the term associated with liberty and sovereignty
With what sport was the term bodyline associated