To determine the type of triangle based on its angles, we can use the following classifications:
- Acute Triangle: All angles are less than 90 degrees.
- Right Triangle: One angle is exactly 90 degrees.
- Obtuse Triangle: One angle is greater than 90 degrees.
In your case, the angles of the triangle are 55 degrees, 61 degrees, and 64 degrees.
Since all of these angles are less than 90 degrees, the triangle is classified as an acute triangle.