In 2 dimensions, triangles and all polygons with 5 or more sides (pentagons, hexagons, heptagons etc); also, circles, ellipses, cycloids, irregular shapes. Theses are non quadrilateral shapes
The question asks about a shape that could be in a box of pattern blocks that is not a quadrilateral (a shape with four sides). Since we have mentioned shapes learned in kindergarten, let's consider the simple shapes that could exist in the box. A square and a rectangle are examples of quadrilaterals, having four sides. A triangle, on the other hand, has three sides and is not a quadrilateral. Therefore, a triangle could be the block that is not a quadrilateral. Kindergarten often introduces us to these basic shapes: squares, triangles, circles, and sometimes even hexagons. Since the question implies there's one shape that isn't a quadrilateral, it wouldn't be a square (with four equal sides) or a rectangle (with opposite sides equal), but it could be a triangle (with three sides), or possibly a circle (with no sides).
In more complex pattern block sets, you could find pentagons (five sides), hexagons (six sides), or even octagons (eight sides), but since those are less commonly taught in kindergarten, the most likely answer is a triangle based on the information provided.
The block that is not a quadrilateral could be a triangle or a circle. Triangles have three sides, while circles have no sides, distinguishing them from quadrilaterals. Both options are valid as alternatives to standard quadrilateral shapes.
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