An eighteen-sided shape is called an octakaidecagon, or octadecagon.
Only if 2 sides are parallel with each other, and the other two sides are also parallel with each other. All squares are rectangles. All rectangles are parallelograms. All parallelograms are 4 sided. But not all 4-sided are parallelograms, not all parallelograms are rectangles, and not all rectangles are squares.
The names of polygons with 40 sides - Tetracontagon.
A Polygon with 26 sides is called a Icosikaihexagon.
A polygon is an unequal six sided shape. A polygon or hexagon is the name used weather the sides are even or not.
A 20-sided shape is called a dodecahedron.
An eighteen-sided shape is called an octakaidecagon, or octadecagon.
Nonagon.
Only if 2 sides are parallel with each other, and the other two sides are also parallel with each other. All squares are rectangles. All rectangles are parallelograms. All parallelograms are 4 sided. But not all 4-sided are parallelograms, not all parallelograms are rectangles, and not all rectangles are squares.
The four sides are NOT parallel. If the fours sides were parallel , it would NOT be a polygon., but just four lines. The opposite sides are parallel. Being the same length, it could be either a 'SQUARE' or a 'RHOMBUS'. The difference being that the square has four right angles (90 degrees)-. A Rhombus has the opposite angles the same, but not a 90 degrees.
A Pentagon. A five sided figure is a pentagon
The names of polygons with 40 sides - Tetracontagon.
A Polygon with 26 sides is called a Icosikaihexagon.
A 1000 sided polygon is called a chiliagon.
A five-sided geometric shape is a pentagon.
It can be a quadrilateral, though quadrilaterals are 4-sided shapes in general.
A polygon is an unequal six sided shape. A polygon or hexagon is the name used weather the sides are even or not.