This is a right triangle the right triangle always has a 90 degrees angle.
This is a obtuse triangle.It has a angle that is between 91 degrees and 179 degrees.
This is a acute triangle.It has a angle that is between 89 degrees.
This is a scalene triangle. A triangle with no two sides of equal length.
This is a isosceles triangle. A triangle with two equal side.
This is a equilateral triangle.All side are equal.