You do not mention the number of sides or even if the sides are straight, but you are probably asking about a trapezium or trapezoid.
Nonagon
Octogon
A shape with straight sides is called a polygon. But it can have 3 or 4 sides as well.
polygon
A square
OK, SO a shape with fewer than four straight sides is a triangle, which has three (3) straight sides. Hope this helps! LOOPDOP says: A circle is a shape. And it has no straight sides..... isn't that "fewer"?
yes it can be a circle has no straight sides, but is symmetrical
what is a shape that have 8 sides
There is no specific name for such a shape.
A heptagon is a 2-dimensional shape with seven straight sides.
You do not mention the number of sides or even if the sides are straight, but you are probably asking about a trapezium or trapezoid.
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.
octagon
a Pentagon...
Octogon.
Octogon