The line segments making the polygon are called its sides, and the points where line segments meet are called the vertices (singular: vertex). **Triangles are polygons with three sides**.

A polygon is any shape made up of straight lines that can be drawn on a flat surface, like a piece of paper. Such shapes include squares, rectangles, triangles and pentagons but not circles or any other shape that includes a curve.

A polygon is any 2-dimensional shape formed with straight lines. Triangles, quadrilaterals, pentagons, and hexagons are all examples of polygons. The name tells you how many sides the shape has. For example, a triangle has three sides, and a quadrilateral has four sides.

Triangles (3-gon)

A triangle is the simplest form of the polygon that has three sides and three vertices.

Polygons may have any number of sides. A polygon. A shape with curved sides is not a polygon. A shape that is not fully closed is not a polygon.

Regular polygons. A regular polygon has all its sides equal and all its angles equal in measures. The examples of a regular polygon are square, equilateral triangle, rhombus, etc.

Answer and Explanation: A 3-sided shape is called a triangle. Triangles are polygons with three sides, so any polygon with three sides is called a triangle.

A polygon is a two-dimensional closed figure that has three or more straight sides. Any figure with straight edges, such as a triangle or rectangle, is a polygon. Figures that have any curved sides or open sides are not classed as polygons.

Miscellaneous. A rectangle is a rectilinear polygon: its sides meet at right angles.

Right triangles are not regular polygons. This is because they have a 90-degree angle, and because the angles in a triangle add up to 180 degrees, it... See full answer below.

The smallest possible polygon in a Euclidean geometry or "flat geometry" is the triangle, but on a sphere, there can be a digon and a henagon. If the edges lines of the polygon do not cross each other, the polygon is called simple, otherwise it is complex.

A Polygon is classified based on its sides like a triangle, quadrilateral, pentagon, hexagon, heptagon, octagon, nonagon, and decagon according as it contains (3, 4, 5, 6, 7, 8, 9) and (10) sides, respectively. In this article, the various types of polygons with definition, their components etc., are discussed.

A polygon is a closed figure on a plane formed from a finite number of lines segments connected end-to-end. As a circle is curved, it cannot be formed from line segments, as thus does not fit the conditions needed to be a polygon.

A heptagon is a polygon that has seven sides.

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Heptagon

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Heptagon

- Triangle ( 3 sided polygon)
- Quadrilateral ( 4 sided polygon)
- Pentagon ( 5 sided polygon)
- Hexagon ( 6 sided polygon)
- Heptagon ( 7 sided polygon)
- Octagon ( 8 sided polygon) and so on.

Non-Euclidean geometry

In spherical geometry, a square is a polygon whose edges are great circle arcs of equal distance, which meet at equal angles. Unlike the square of plane geometry, the angles of such a square are larger than a right angle. Larger spherical squares have larger angles.

A triangle is 3 sided polygon.

A rectangle only shares one of these properties, i.e. equal Angles, so, Rectangle is not a regular polygon.

In geometry, a simple polygon /ˈpɒlɪɡɒn/ is a polygon that does not intersect itself and has no holes. That is, it is a flat shape consisting of straight, non-intersecting line segments or "sides" that are joined pairwise to form a single closed path. If the sides intersect then the polygon is not simple.

Pentagon shape

Like other polygons such as triangle, quadrilaterals, square, rectangle, etc., the pentagon is also a polygon that contains five sides and five angles.

A circle is not a polygon as it does not have straight sides.