A right angle triangle
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The only polygon with just acute angles is an acute angled triangle.
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
Parallelogram.
All triangles have at least two acute angles. Acute triangles have three. Rhomboids also have two acute angles.
Yes, a rhombus has two acute angles.