The word acute refers to angles, not sides. It does have all three angles are acute (less than 90Â°)
Any triangle that has three equals sides must have three acute angles and is equilateral.
A rhombus would fit the given description which has 2 equal opposite acute angles and 2 equal opposite obtuse angles whereas the 4 angles add up to 360 degrees.
A rhombus is a shape having two acute angles and four equal sides.
Any shape with 4 acute angles must have more than 4 sides. Any shape with more than 4 sides can have 4 acute angles (but doesn't have to).
An equilateral triangle
it is a rhombus
It is an irregular pentagon.