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Basic Geometrical Ideas, Group 3 Members - Coggle Diagram

- - - - It is denoted by ↔
  - - - Intersecting Lines
        
        Intersecting Lines are lines which have one common point
      - Parallel Lines
        
        Lines which do not meet are called parallel lines.
- - - - Like rays, They are denoted by --->. Although, some angles are sometimes denoted by /_ because of certain situations.
- - - - A curve which does not cross itself is a simple curve.
        
        While a curve which does cross itself is a nonsimple curve.
    - - It is a curve which is closed and does not cross itself
    - - A curve which is not connected is called an open curve.
- - - - heptagon
      - hexagon
      - pentagon
      - octagon
      - quadrilateral
      - triangle
        
        3 sided polygon, the polygon whit the least number of sides
      - nonagon
      - decagon
- - - - Centre. A centre of a circle is the middle of a circle.
      - Chord. A chord is something that connects two points on a circle. For example, A radius could also be called a chord.
      - Radius. Radius is a line segment that connects to the centre point.
      - Arc. An arc is a portion of a circle.
      - Diameter. Diameter is the double of a radius.
      - Sector. A region in the interior of a circle enclosed by an arc on one side and radii (plural of radius) on the other two sides, We get a sector.
      - Segment. A region in the interior of a circle enclosed by a chord and an arc is called a segment.