What is an example of a concave polygon?

What is an example of a concave polygon?

Concave polygon: If at least one angle of a polygon is more than 180°, then it is called a concave polygon. Examples of concave polygons: In the adjoining figure of a hexagon there are six interior angles i.e., ∠ABC, ∠BCD, ∠CDE, ∠DEF, ∠EFA and ∠FAB.

What does the term concave polygon mean?

A concave polygon is a polygon that is not convex. A simple polygon is concave iff at least one of its internal angles is greater than. . An example of a non-simple (self-intersecting) polygon is a star polygon. A concave polygon must have at least four sides.

Are glasses concave?

Glasses to correct near-sightedness are concave, for the far-sighted (reading glasses) convex.

Where is concave mirror used?

Concave mirrors are used as searchlights, shaving mirrors, satellite dishes, and many more. These mirrors have the property to collimate and concentrate light rays. Concave mirrors in torches and headlights are used as reflectors.

What are 2 uses of convex lens?

Uses Of Convex Lens

  • Magnifying glasses.
  • Eyeglasses.
  • Cameras.
  • Microscopes.

What is ISO do?

What does ISO do? The ISO is how you can adjust the exposure on your camera. It’s one of the three main pillars of exposure — along with shutter speed and aperture. Changing the ISO will brighten or darken your image.

Is a lens a convex?

An optical lens is generally made up of two spherical surfaces. If those surfaces are bent outwards, the lens is called a biconvex lens or simply convex lens….Difference between convex and concave lens:

This lens converges a straight beam of light. This lens diverges a straight beam of light.

What is a lens in literature?

A critical lens is a way of looking at a particular work of literature by focusing on style choices, plot devices, and character interactions and how they show a certain theme (the lens in question). It is a common literary analysis technique.