The union of the segments AB, BC, and AC of three nonlinear points A, B, and C.
The definition of a circle is not part of the triangle (or tringle, even) proportionality theorem.
Yes. You would have to have a right angle and two 45 degree angles
The three inside angles of any tringle always add up to 180 degrees.
its a paranormal place
No.
equilateral
No, and neither does a triangle.
5
Scalene.
axis
A scalene triangle.
180 degrees are in a triangle.