A cylinder seems to fit the description
It could be a cylinder
A triangle has to have straight sides
This is called a heptagon.
A shape with straight sides is called a polygon. But it can have 3 or 4 sides as well.
A major sector of a curve.
A two-dimensional shape with one curved side and four straight sides can be created, but there is not specific name for such a shape.
A quadrilateral is a shape with four straight sides. There are no curved sides in a quadrilateral.
no because a quadrilateral has straight sides if it were curved it wouldn't be a polygon because polygons must have straight sides
Yes
There is no specific name for such a shape.
Cone
It could be a cylinder
A triangle has to have straight sides
Plane polygonal shapes, that is, shapes with straight line boundaries must have 3 or more sides. If they have only two sides, these cannot be straight. They can wriggle all over the place and the shape has no name.
Circles have a completely curved shape, and NO sides. So do ovals.
This is called a heptagon.
A shape with straight sides is called a polygon. But it can have 3 or 4 sides as well.