Hey there!
An equilateral triangle is a triangle that has all equal sides and angles. All the angles in a triangle equal 180 degrees. All triangles have 3 angles. 180/3=60 Each angle in an equilateral triangle is equal to 60 degrees. Acute angles are less than 90 degrees, so: 60<90. This makes every equilateral triangle acute.
I hope this helps!
~kaikers