A triangle with three acute angles is called an acute triangle.
In geometry, an acute triangle is defined as a triangle where all three interior angles are less than 90 degrees. This means that not only do the individual angles measure less than a right angle, but the sum of these angles will always equal 180 degrees, which is true for all triangles.
The characteristic feature of an acute triangle is that it appears ‘pointy’ because the angles are sharp. This type of triangle can come in various forms, such as equilateral triangles (where all angles are equal and measures 60 degrees) or isosceles triangles (where two angles are equal, and the third is less than 90 degrees). Regardless of their specific shape, the essential point remains: each angle must be less than 90 degrees for the triangle to be classified as acute.