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Polygons are most commonly discussed plane shapes apart from circles. In geometry, a polygon can be defined as a flat or plane, two-dimensional closed shape bounded with at least three sides. It does not have curved sides. The sides of a polygon are also called its edges. The points where two sides meet are the vertices (or corners) of a polygon.
- Polygon
2. Sum of the exterior angles of polygons. Sum of the...
- Polygon
- Is It A polygon?
- Types of Polygons
- Remembering
Polygons are 2-dimensional shapes. They are made of straight lines, and the shape is "closed" (all the lines connect up).
Regular or Irregular
A regular polygon has all angles equal and all sides equal, otherwise it isirregular
Concave or Convex
A convexpolygon has no angles pointing inwards. More precisely, no internal angle can be more than 180°. If any internal angle is greater than 180° then the polygon is concave. (Think: concave has a "cave" in it)
Simple or Complex
A simple polygon has only one boundary, and it doesn't cross over itself. A complexpolygon intersects itself! Many rules about polygons don't work when it is complex.
Quadrilateral
A QuadBike has 4 wheels
Pentagon
The "Pentagon" in Washington DC has 5 sides
Hexagon
Honeycomb has Hexagons
2. Sum of the exterior angles of polygons. Sum of the exterior angles of polygons = 360° The sum will always be equal to 360 degrees, irrespective of the number of sides it has. For example: Consider the following polygon with 5 sides. Here, ∠m + ∠n + ∠o + ∠p + ∠q = 360° Angles in Regular Polygon. In a regular polygon, all its ...
- A diagonal of a polygon is a line segment connecting two non-consecutive vertices (corners).
- A Regular polygon has all sides of equal length and each angle also measures equal.
- Polygon is a closed shape made up of straight-line segments. The circle is a closed figure but it is made of a curve. So, a circle is not a polygon.
- A polygon must have a minimum of three sides.
- No, polygons have the same number of sides and angles because they are closed figures with non-intersecting lines.
A plane figure is a flat shape. It does not have depth or thickness. Plane figures only have two dimensions (length and width). Thus, they are also known as 2D figures or two-dimensional shapes. Some common examples of geometric plane figures are squares, rectangles, circles, triangles, etc. A plane figure lies all within a single plane.
Jul 16, 2019 · 3D means three dimensional. Three dimensional shapes can be picked up and held because they have length, width and depth. Faces are the surfaces on the outside of a shape. Edges are the lines where two faces meet. Vertices (or corners) are where two or more edges meet. 3 Dimensional shapes have length, width and depth.
Polyhedrons (or polyhedra) are straight-sided solid shapes. Polyhedrons are based on polygons, two dimensional plane shapes with straight lines. See our page Properties of Polygons for more about working with polygons. Polyhedrons are defined as having: Straight edges. Flat sides called faces. Corners, called vertices.
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A sphere is a solid shape defined in a 3-dimensional space. It has no edges or vertices (corners). A shape can be defined as the boundary or outline of an object. A plane shape is a two-dimensional closed figure that has no thickness. Learn about shapes, the different types of shapes, circle, rectangle, square, oval, triangles, and polygons and ...
