The shape you are describing is an equilateral triangle with all angles less than 90 degrees.
Based on the given description, the shape you are describing is likely an acute-angled triangle.
An acute-angled triangle is a type of triangle where all three angles are less than 90 degrees, meaning there are no right angles.
Additionally, if all the sides are congruent, it is an equilateral triangle. In an equilateral triangle, all sides are of equal length.
So, the shape you are describing is an equilateral triangle with all angles less than 90 degrees.
The sum of the angles in any triangle is always 180 degrees, and since all angles are acute (less than 90 degrees), the total of the angles in this equilateral triangle will be less than 360 degrees.