It is enneadecagon (or enneakaidecagon or nonadecagon).
a crescent has 19 sides
How many sides does a Decahedron Have
8 sides
10 sides
It is a nonadecagon polygon of 19 sides
It is enneadecagon (or enneakaidecagon or nonadecagon).
It is a 19 sided polygon.
Nonadecagon
An enneadecagon (or enneakaidecagon or nonadecagon).
A nineteen sided polygon is called a Nonadecagon or an Enneadecagon.
A 19-sided polygon is an enneadecagon (also enneakaidecagon or nonadecagon).
Geometric shapes formed from three or more straight lines (polygons) include:3 sidestriangle4 sides (quadrilaterals)square (4 equal sides, right angles)trapezoid (4 sides with only 1 set of parallel lines)rectangle (4 sides with 2 sets of parallel lines)rhombus (4 sides, 2 parallel pair)5 sides - pentagon6 sides - hexagon7 sides - heptagon (rarely septagon)8 sides - octagon9 sides - enneagon (classically - nonagon)10 sides - decagon11 sides - hendecagon (classically - undecagon)12 sides - dodecagon (classically - duodecagon)13 sides - tridecagon or triskaidecagon14 sides - tetradecagon15 sides - pentadecagon16 sides - hexadecagon17 sides - heptadecagon18 sides - octadecagon19 sides - enneadecagon (nonadecagon)20 sides - icosagon*For a list of some other basic shapes, see the related link.
The names of common 2-dimensional geometrical shapes: No straight sides - circle (constant diameter) - ellipse, oval (varying width) Three or more straight lines (polygons) -- 3 sides -triangle 4 sides - quadrilaterals square (4 equal sides, right angles) trapezoid (4 sides with only 1 set of parallel lines) rectangle (4 sides with 2 sets of parallel lines) rhombus (4 sides, 2 parallel pair) 5 sides - pentagon 6 sides - hexagon 7 sides - heptagon (rarely septagon) 8 sides - octagon 9 sides - enneagon (classically - nonagon) 10 sides - decagon 11 sides - hendecagon (classically - undecagon) 12 sides - dodecagon (classically - duodecagon) 13 sides - tridecagon or triskaidecagon 14 sides - tetradecagon 15 sides - pentadecagon 16 sides - hexadecagon 17 sides - heptadecagon 18 sides - octadecagon 19 sides - enneadecagon (nonadecagon) 20 sides - icosagon 30 sides - tricontagon 1000 sides - chiliagon 10000 sides - myriagon 1000000 sides - megagon (see the related link for more names)
a crescent has 19 sides
how many sides does an polygonshave
10 sides.