Polygon Records ended in 1955.
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The end point where two sides of a polygon meet is the Vertex.
The triangle is a polygon with 3 sides. The polygon is a closed planar geometric shape made of line segments connected end to end to end. All triangles are polygons, but not all polygons are triangles. There are many variations on the theme when it comes to a polygon. There are many, many different kinds.
ABC Records ended in 1979.
A curved line without a closed end
decagon, dodecagon, polygon,