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Q: Are all 2D shape polygons

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2D.

It is the cube which is a 3D shape while the others are all 2D polygons

It is the cube which is a 3D shape while the others are all 2D polygons

Polygons are 2d shapes whereas polyhedrons are 3d shapes

A rectangle is one of many names in the classification of 2D shapes as are polygons

2 dimensional shapes are 2D shapes and polygons are plain shapes with no curves. So some 2D polygons would be squares , rectangle and many more . A circle would not be a 2D polygon.

All polygons and polyhedra.All polygons and polyhedra.All polygons and polyhedra.All polygons and polyhedra.

Common ones are polygons, such as squares, rectangles, octagon etc. Any shape restricted to the xy plane is a 2d shape.

Similar polygons are polygons for which all corresponding angles are congruent and all corresponding sides are proportional. From this definition we can say they have the same shape.

2d shapes can by polygons or circles or very irregular shapes, but the point is they all fit on the plane so they are called planar.

10 sided 2D shape is called a decagon 20 sided 2D shape is called a icosagon 30 sided 2D shape is a swimming pool 40 sided 2D shape is unknown 50 sided 2D shape is unknown 60 sided 2d shape is unknown 70 sided 2d shape is unknown 80 sided 2d shape is unknown 90 sided 2d shape is unknown 100 sided 2d shape is unknown 110 sided 2d shape is unknown 111 sided 2d shape is unknown 120 sided 2d shape is unknown 130 sided 2d shape is unknown

There is no maximum. For any integer n, there is a regular polygon (a 2-d shape) with n sides. And there are non-regular polygons as well.

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