Euclidean geometry

Euclidean geometry is a form of geometry first codified by a man called Euclid in his series of thirteen books called The Elements.

Some of the concepts used and described in Euclidean geometry are

• point
  
• line
  
• surface
  

8straight line

• plane
  
• plane angle
  
• rectilinear angle
  
• right angle
  
• perpendicular
  
• obtuse angle
  
• acute angle
  
• boundry
  
• figure
  
• circle
  
• center
  
• diameter
  
• semicircle
  
• rectilinear figure
  
• trilateral
  
• quadrilateral
  
• multilateral
  
• equilateral triangle
  
• isoscelese triangle
  
• scalene triangle
  
• right angled triangle
  
• obtuse angled triangle
  
• acute angle triangle
  
• equilateral
  
• right angle
  
• square
  
• oblong
  
• rhombus
  
• rhomboid
  
• trapezia