The only polygon with just acute angles is an acute angled triangle.
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A triangle is the only shape that can have only acute angles inside it.
If the shape has 3 angles in all, where two of the angles are acute, then the shape is a scalene triangle.
A shape that can contain no acute angles is a rectangle. In a rectangle, all interior angles are right angles, which are exactly 90 degrees. This means there are no angles smaller than 90 degrees, which are considered acute angles. Therefore, a rectangle is an example of a shape that contains no acute angles.
A quadrilateral is any shape with four sides; angles can be acute or obtuse. A perfect square is the only quadrilateral with only right angles.
triangle