https://commons.wikimedia.org/wiki/File:Abu_Reyhan_Biruni-Earth_Circumference.svg

Diagram illustrating a method proposed and used by Al-Biruni to estimate the radius and circumference of the Earth

Understanding Autism For Dummies Cheat Sheet - For Dummies  Great piece about how to create a safe environment and how to make a safety card to have the person keep on them at all times in case they wander off and need help but don't know how to ask for it.

Living Gluten free Cheat Sheet for Dummies , a Wiley Brand - Making Everything Easier

trig ratio foldable and answer to what is a radian? Math = Love: Trigonometry Unit 2 Interactive Notebook Pages

I am so behind in posting stuff from this school year. So, so, soooooooo behind. Here& what Unit 2 ended up looking like in my.

The Khan Academy is a free online educational resource with a mission to provide a world class education to any person who desires one.  There are over 3,600 videos covering a wide range of topics from Kindergarten to college level skills.  The tutorials are self-paced and they are all free of charge.

Free Educational Resource: Khan Academy

KHAN ACADEMY: A free world-class education for anyone anywhere. Khan Academy is an organisation on a mission. We're a not-for-profit with the goal of changing education for the better by providing a free world-class education for anyone anywhere.

The Mathematics of the Heavens and the Earth: The Early History of Trigonometry

The Mathematics of the Heavens and the Earth: The Early History of Trigonometry

History of trigonometry (wiki) - equation for calculating sine. Sine function defines the relationship between the opposite side and the longest side of the triangle as a ratio.

History of trigonometry (wiki) - equation for calculating sine. Sine function defines the relationship between the opposite side and the longest side of the triangle as a ratio.

What exactly is Trigonometry? Where and when was it first used? How was it invented? A brief history of trigonometry and important figures who helped invent it. #history #trigonometry #hipparchus #ptolemy

What exactly is Trigonometry? How was it invented? A brief history of trigonometry and important figures who helped invent it.

Smartest man who ever lived??  IQ estimated between 250 & 300. Taught himself 8 languages as a child & was eventually conversant ~ 40, invented another & entered Harvard, age 11 (2 yrs later than he wanted). A mathematical as well as linguistic genius and went on to teach classes in geometry and trigonometry in Texas at the age of 17. Sadly he never fulfilled his potential, preferring a lifetime of isolation and privacy. He worked a succession of menial jobs until his death at the age of 46.

William James Sidis, un atormentado joven con una prodigiosa inteligencia

William James Sidis , gifted with an astounding IQ estimated between 250 and the age of he became the youngest student to have ever enrolled at the Harvard University. He graduated cum laude at the age of and entered Harvard Law School at

3,700-year-old Babylonian tablet rewrites the history of maths - and shows the Greeks did not develop trigonometry

3,700-year-old Babylonian tablet rewrites the history of maths - and shows the Greeks did not develop trigonometry

Mathematical mystery of ancient Babylonian clay tablet solved: "UNSW scientists have discovered the purpose of a famous old Babylonian clay tablet [Plimpton revealing it is the world's oldest and most accurate trigonometric table.

Hipparchus is many times refered to as the father of trigonometry. He first used his trigonometric methods for astronomy. #hipparchus #trigonometry #history

Who is the father of trigonometry?

Hipparchus is many times refered to as the father of trigonometry. He first used his trigonometric methods for astronomy.

Full-length SAT Practice | Khan Academy: "Khan Academy partners with College Board to provide Free SAT prep"

Think of a mixed numbers as a number AND a fraction.you can add fractions with like denominators. Therefore, you can add mixed numbers!

Kolkata’s Great Trigonometrical Survey link: Of trigonometry and towers - The Hindu

Often believed by locals and passersby to be abandoned churches or lighthouses, these lofty towers built of fired bricks can be spotted in and around Kolkata.Not many are aware that these structures,

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