a two-dimensional closed shape with straight sides and equal angles between adjacent sides, and all sides have the same length

正多角形, 正幾何学図形
a polygon that does not have all sides or angles equal in size or measure, making it non-regular and lacking symmetry

不規則多角形, 非正多角形
a geometric shape that has all its interior angles measuring less than 180 degrees, causing the polygon to curve outward

凸多角形, 凸状の幾何学的形状
a geometric shape that has at least one angle measuring greater than 180 degrees, causing the polygon to curve inward

凹多角形, 凹んだ幾何学的形状
(geometry) a flat figure with four straight sides and four angles

四角形, 四つの直線の辺と四つの角を持つ平面図形
a geometric shape with five angles and five straight sides

五角形, 五辺形
(geometry) a closed shape with six straight sides and six angles

六角形, 六辺形
a seven-sided plane shape consisting of seven line segments or edges that meet at seven interior angles

七角形, ヘプタゴン
(geometry) a polygon consisting of eight straight sides and eight angles

八角形, 八辺形
(geometry) a flat polygon with ten straight sides and ten angles

十角形, 十辺形
(geometry) a flat figure consisting of eleven straight sides and eleven angles

十一角形, ヘンデカゴン
a five-pointed star

五芒星, 五角星
(geometry) a flat star-shaped figure with six points that can be formed by making equilateral triangles on each side of a regular hexagon

六線星, 六芒星
a three-sided geometric shape

三辺形, 三辺の図形
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