There is no kind of shape that has a straight line or curved line a kind of element of the following question is "space"...hope this helps
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Yes, a shape can have three straight sides and one curved side. This type of shape is known as a triangle with one curved side, which is also called a curved triangle or a curved-sided triangle. The curved side can be a segment of a circle or any other curved shape, while the other three sides are straight lines.
A curvilinear pattern is a curvilinear shape ( a shape made completely of curved lines. no straight lines/edges) repeated across a plane.
No, all polygons have straight lines. All lines are straight
No, it is not. A polygon is a plane space enclosed by straight lines. A fork is not a plane shape - it is 3-dimensional. Furthermore, a fork has several curved aspects.
no because a quadrilateral has straight sides if it were curved it wouldn't be a polygon because polygons must have straight sides