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Words Related to Colors and Shapes - Polygons
Read this lesson to learn the names of polygons in English, such as "convex polygon", "heptagon" and "hendecagon".
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regular polygon
[noun]
a two-dimensional closed shape with straight sides and equal angles between adjacent sides, and all sides have the same length
irregular polygon
[noun]
a polygon that does not have all sides or angles equal in size or measure, making it non-regular and lacking symmetry
convex polygon
[noun]
a geometric shape that has all its interior angles measuring less than 180 degrees, causing the polygon to curve outward
concave polygon
[noun]
a geometric shape that has at least one angle measuring greater than 180 degrees, causing the polygon to curve inward
heptagon
[noun]
a seven-sided plane shape consisting of seven line segments or edges that meet at seven interior angles
dodecagon
[noun]
(geometry) a flat figure that consists of twelve sides and twelve angles
hexagram
[noun]
(geometry) a flat star-shaped figure with six points that can be formed by making equilateral triangles on each side of a regular hexagon
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