Equilateral and isosceles triangles - Free Printable

After examining triangle 'h', I can see that it has one angle that is clearly greater than 90 degrees, making it an obtuse triangle. The other two angles are acute, and the sides appear to be of different lengths, suggesting it is a scalene obtuse triangle.

Now that I have analyzed all eight triangles, I can summarize the classifications:

- Triangle a: Isosceles right triangle (two equal sides, one 90-degree angle)
- Triangle b: Scalene acute triangle (all sides different, all angles acute)
- Triangle c: Equilateral acute triangle (all sides equal, all angles 60 degrees)
- Triangle d: Scalene right triangle (all sides different, one 90-degree angle)
- Triangle e: Scalene obtuse triangle (all sides different, one angle > 90 degrees)
- Triangle f: Equilateral acute triangle (all sides equal, all angles 60 degrees)
- Triangle g: Isosceles acute triangle (two equal sides, all angles acute)
- Triangle h: Scalene obtuse triangle (all sides different, one angle > 90 degrees)

This completes the classification of all the triangles in the image.