# data[].attributes.body
2500 BC

First Egyptian pyramids constructed using masterful planning as well as sharp and detailed understanding of geometrical shapes and concepts.

# data[].attributes.body
2,000 BC

This was the first known instance of someone correctly mapping the area of a triangle with a pre-determined formula in recorded history.

# data[].attributes.body
1800 BC

The Moscow Mathematical Papyrus was a document discovered containing 25 new ideas in mathematical and geometrical history.

# data[].attributes.body
1650 BC

The Rhind Papyrus was an 18 feet wide document containing 48 new problems revolving mostly around dealing with fractions.

# data[].attributes.body
800 BC

Baudhayana, author of the Baudhayana Sulba Sutra, a Vedic Sanskrit geometric text, contains quadratic equations, and calculates the square root of 2 correct to five decimal places.

# data[].attributes.body
700 BC

The Shatapatha Brahmana is a prose text describing Vedic rituals, history and mythology associated with the Śukla Yajurveda.

# data[].attributes.body
628 BC

Brahmagupta's formula: The area, A, of a cyclic quadrilateral with sides of lengths a, b, c, d, respectively

# data[].attributes.body
600 BC

the other Vedic “Sulba Sutras” (“rule of chords” in Sanskrit) use Pythagorean triples, contain of a number of geometrical proofs, and approximate π at 3.16.

# data[].attributes.body
340 BC

Pappus of Alexandria states his hexagon theorem and his centroid theorem.

# data[].attributes.headline
Hipparchus develops the bases of trigonometry.

# data[].attributes.subject
Hipparchus develops the bases of trigonometry.

# data[].attributes.body
140 BC

# data[].attributes.headline
The Nine Chapters on the Mathematical Art

# data[].attributes.subject
The Nine Chapters on the Mathematical Art

# data[].attributes.body
100 BC

The Nine Chapters on The Mathematical Art lays out an approach to mathematics that centers on finding the most general methods of solving problems

# data[].attributes.body
624 BC - 546 BC

Created and proved Thales Theorem DE/BC=AE/AC=AD/AB

# data[].attributes.body
570 BC - 495 BC

Pythagorean theorem is named after him although its not been proven that he ever even existed

A2+B2=C2

# data[].attributes.body
455 BC

A set of philosophical problems generally thought to have been devised by Greek philosopher Zeno of Elea

# data[].attributes.body
450 BC

First recorded incident of written numerals in Greece

# data[].attributes.body
427 BC - 347 BC

a philosopher that is highly esteemed by the Greeks. There is a story that he had inscribed above the entrance to his famous school, "Let none ignorant of geometry enter here." However, the story is considered to be untrue.

He was NOT a mathematician however his views helped shape many concepts

# data[].attributes.body
410 BC

After Archimedes died hellenistic geometry started to decline in popularity

# data[].attributes.body
387 BC

Plato founds the Academy in Athens. He identifies five polyhedra now known as Platonic bodies.

# data[].attributes.headline
Eudoxus Rational and Irrational Comparison

# data[].attributes.subject
Eudoxus Rational and Irrational Comparison

# data[].attributes.body
360 BC

Eudoxus makes a definition allowing the possibility of using irrational lengths and comparing them with rational lengths by using cross multiplication.

# data[].attributes.body
325 BC - 265 BC

Euclid is considered to be one of the three greatest mathematicians of all time. He discovered Euclidean geometry which use his axioms and theorems as they relate to plane and solid figures.

# data[].attributes.body
300 BC

Euclid writes The Elements, a book discussing Euclidean geometry. The Elements is a collection of 13 books of definitions, postulates, and axioms. It became the 3rd most popular book in the world, after the Koran and the Bible.

# data[].attributes.body
287 BC - 212 BC

Archimedes is regarded as the greatest Greek mathematician. He invented 3 simple machines, the pulley, screw, and lever. The Archimedes screw, a device used for raising water, is still in use today. He also analyzed the area of a circle and discovered how to calculate volumes and surface areas of spheres and cylinders.

# data[].attributes.body
250 BC

Archimedes discovers the formula for how to calculate the volume of a cylinder.

# data[].attributes.body
235 BC

Eratosthenes estimates the circumference of the Earth, only missing by about 15%.

# data[].attributes.body
628 AD

Brahmagupta created a formula for finding the area of a quadrilateral, with sides a,b,c,d, enclosed by a circle: A = The Sq. Root of (s-a)(s-b)(s-c)(s-d). S is the semi-perimeter, is found by the formula s=(a+b+c+d)/2

# data[].attributes.body
1596 - 1650

Descartes synthesized algebra and geometry by placing points on a coordinate plane.

# data[].attributes.body
1600

Putumana Somayaji writes the "Paddhati", which presents a detailed discussion of various trigonometric series

# data[].attributes.body
25 December 1643 - 20 March 1727

Widely known as a the man who helped revolutionize the concept of gravity Newton made several contributions to mathematics and geometry as well as science including being credited as one of the fathers of calculus.

# data[].attributes.body
July 1 1646 - November 14 1716

Leibniz was a German mathematician who is credited as also being a father of modern calculus

# data[].attributes.body
1777 - 1855

Gauss developed the Gauss method for adding large amounts of consecutive numbers when he was six. However, his most important creation is that of non-Euclidean geometry. Non-Euclidean geometry is geometry not based on the postulates of Euclid. This includes times when the parallel postulate isn't true. Parallel Postulate - Through a given point not on a line, there is one and only one line parallel to it.