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Learn how to calculate the sum and value of internal angles in regular and irregular polygons using a formula. Watch a video, try activities and play a maths game to test your skills.
Learn what polygons are and how to identify them by their number of sides and angles. Find out the types of polygons, such as regular and irregular, and their properties, such as parallel and perpendicular lines.
A polygon close polygon A polygon is a 2-dimensional closed shape with straight sides, eg triangle, hexagon, etc. is a 2D close two-dimensional (2D) Having only two dimensions, usually length (or ...
- Is It A polygon?
- Types of Polygons
- Remembering
- GeneratedCaptionsTabForHeroSec
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
Learn what a polygon is, how to classify it by sides, angles, and shapes, and how to name it. Explore interactive polygons and see examples of regular, irregular, convex, concave, simple and complex polygons.
Learn what a polygon is, how to classify it as regular or irregular, convex or concave, and explore its properties and angles. Find free resources for teaching and learning about polygons in maths.
People also ask
What is the difference between a polygon and a regular polygon?
Is a polygon a straight line or a convex?
What is a concave polygon?
What is the difference between a regular and a convex polygon?
How do you identify a polygon?
How are polygons classified?
Polygon. Some polygons of different kinds: open (excluding its boundary), boundary only (excluding interior), closed (including both boundary and interior), and self-intersecting. In geometry, a polygon ( / ˈpɒlɪɡɒn /) is a plane figure made up of line segments connected to form a closed polygonal chain . The segments of a closed polygonal ...
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