some triangles and rhombuses. trapoziods do not have acute angles it has obtuse angles. :)
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A triangle is the only shape that can have only acute angles inside it.
All triangles have at least two acute angles. Acute triangles have three. Rhomboids also have two acute angles.
Acute angles
The only polygon with just acute angles is an acute angled triangle.
None. Though there can be ten if the hexagons are concave hexagons.