Other forms: polygons
A polygon is any flat shape made of straight sides. A five-sided polygon, a regular polygon, the interior angles of a polygon.
Triangles, squares, pentagons and hexagons are all polygons; a circle is not, because it has no straight sides. A regular polygon has equal sides and equal angles. The interior angles of any polygon add up to 180 degrees times two fewer than the number of sides, which is one of the more useful formulas in school geometry. Note polyhedron, which is the three-dimensional equivalent, and that in computer graphics everything is built from polygons.
1nounpolygonA flat shape made of straight sides.
“The students drew a polygon on squared paper and measured each of its angles.”
polygon is a geometric shape.
Greek polygonon is poly-, many, plus gonia, an angle. The shape is named for its corners rather than its sides, which is why a triangle is a three-angle and not a three-side.
Ancient Greek
πολύγωνον
English, today
polygon
Built from
From Ancient Greek πολύγωνον, from πολύς (“many”) + γωνία (“angle”), equivalent to poly- + -gon.
Etymology from Wiktionary, CC BY-SA