Yes, every equilateral triangle is acute.
An equilateral triangle is defined as a triangle in which all three sides are of equal length. Since all sides are equal, the angles opposite these sides are also equal. In an equilateral triangle, each angle measures exactly 60 degrees.
Since an acute triangle is defined as a triangle where all angles are less than 90 degrees, and since 60 degrees is indeed less than 90 degrees, it follows that all angles in an equilateral triangle satisfy the condition of being acute. Therefore, we can confidently say that every equilateral triangle is acute.