Euclid was a Greek mathematician from ancient Greece who is often referred to as "The Father of Geometry". He is renowned for writing the influential textbook "The Thirteen Books of Elements", which covered fundamental geometric concepts such as triangles, parallels, area, circles, constructions, proportions, number theory, and solid geometry. The textbook was widely used as the core text for teaching geometry and mathematics for over 2000 years.

1. By: ReshawnWhaley

2.  Euclid was a Greek mathematician.
 He was often referred to as “The FatherOf
Geometry”
 He was the founder of “TheThirteen Books
Of Elements”

3.  The fundamentals of geometry: theories of
triangles, parallels, and area.

4.  Geometric algebra.

5.  Theory of circles.

6.  Constructions for inscribed and circumscribed
figures.

7.  Theory of abstract proportions.

8.  Similar figures and proportions in geometry.

9.  Fundamentals of number theory.

10.  Continued proportions in number theory.

11.  Number theory.

12.  Classification of incommensurables.

13.  Solid geometry.

14.  Measurement of figures.

15.  Regular solids.