Parallelogram.
The only polygon with just acute angles is an acute angled triangle.
trapezoid
If its acute angles are different then it is not a regular polygon but if it has 3 equal acute angles of 60 degrees then it is a regular equilateral triangle
A right angle triangle
Parallelogram.
A polygon, that is, a plane area bounded by any number (>2) of straight lines can have acute angles.
trapezoid
polygon
An acute triangle.
a tapezium
The only polygon with just acute angles is an acute angled triangle.
Any polygon can contain acute interior angles.
A regular pentagon has no acute angles. It is possible to draw a pentagon (five sided polygon) where four of the internal angles are acute.
trapezoid
An acute polygon is one whose interior angles are all acute. Only a triangle can be an acute polygon.
A rhombus has 4 equal sides, 2 acute angles and 2 obtuse angles. If you are looking for a polygon with 4 equal sides and ALL acute angles, that can't exist. An acute angle is an angle of less than 90 degrees, so four of them add up to less than 360 degrees. But the four angles inside a four-sided polygon must add up to 360 degrees, so they can't all be acute.