an octagon it has eight sides
trapezoid
There is no specific name for such a shape.
It it called a trapeziumor a Square
Trapezium
A shape that has 4 right angles and 2 pairs of parallel lines is a rectangle. In a rectangle, all four angles are right angles, meaning they measure 90 degrees each. Additionally, opposite sides of a rectangle are parallel, resulting in two pairs of parallel lines within the shape.
trapezoid
Trapezium (Uk English)
A shape with 4 straight lines in which there are 2 parallel and 2 unparallel lines is called a Trapezium.
A trapezoid perhaps?
A right trapezium.
The four sided shape that has two parallel lines is called a trapezoid. A parallelogram is a four sided shape that has two pairs of parallel lines.
quadrilateral
A regular octagon.
paralellogram
A shape that has 2 parallel lines and 4 perpendicular lines is a rectangle. In a rectangle, the opposite sides are parallel, while the adjacent sides are perpendicular to each other. Therefore, a rectangle fits the description of having two sets of parallel lines and four right angles formed by the perpendicular lines.
parallelogram
Trapezoid