# Geometry and Trigonometry

### The Historical Timeline

## Geometry

The word geometry is rooted from the Greek word "geometrein" meaning "earth measuring. Geometry was known as the science of measuring land.

## Euclid the "Father of Geometry" 300 BCE Greek mathematician. Founded Ecuildean Geometry, the study of plan and solid figures on the basis of axioms and theorems. He realized and defined elements of plane geometry such as lines, points, angles, circles, and triangles. He also founded "parallel postulate", later being the basis for parallel lines. | ## Apollonius of Perga, known as the “Great Geometer” c.262-190 BC Using Euclid's findings, Apollonius founded analytic geometry, the study of a conic as the intersection of a plane and a cone. With Euclid's findings on similar triangles and circles, he discovered a relationship between the distance from any point of a conic to perpendicular lines using the axis of the conic and tangent at an endpoint. |

## Euclid the "Father of Geometry" 300 BCE

Greek mathematician. Founded Ecuildean Geometry, the study of plan and solid figures on the basis of axioms and theorems. He realized and defined elements of plane geometry such as lines, points, angles, circles, and triangles. He also founded "parallel postulate", later being the basis for parallel lines.

## Apollonius of Perga, known as the “Great Geometer” c.262-190 BC

Using Euclid's findings, Apollonius founded analytic geometry, the study of a conic as the intersection of a plane and a cone. With Euclid's findings on similar triangles and circles, he discovered a relationship between the distance from any point of a conic to perpendicular lines using the axis of the conic and tangent at an endpoint.