Yes.
It is still a triangle.
An upside-down triangle. It does not matter from which direction you view a triangle, it will still be a triangle.
Yes, the angle is still 90 degrees so it is still a right angle.
no it is its own type of triangle class
No, an acute triangle must have all 3 angles under 90 degrees. A triangle can have an acute angle and still be a right triangle or an obtuse triangle.
The right triangle helps us find many measurements in the world. There are many right triangles in the world, and they help us create many structures.
I think it is because people are used to read from left to right ( normally ), but when they read upside down with text or numbers, they still read from left to right, and that is why reading upside down, in my opinion, affects our fist thoughts without hesitating. Tell me if I am wrong or not!
To symbolise distress. If you simply turn it upside down then it would symbolise distress, if you rotate it however it is still the same.
ambigram
Yes and its 3 interior angles would still add up to 180 degrees
3. Vertex (singular of Vertices) is the POINT of the sides (ray, segment, line) come together. For any triangle it always has 3 angles, and thus 3 points, which means 3 vertices. A right triangle is still an triangle, only that one of the 3 angles being 90 degree.
It is Pythagoras' theorem that is applicable to any right angle triangle.