Find the length of red arc AB
[2605] Find the length of red arc AB - Find the length of red arc AB (r1=1, r2=2). Express result to the accuracy of 3 decimal. - #brainteasers #math - Correct Answers: 43 - The first user who solved this task is Roxana zavari
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Find the length of red arc AB

Find the length of red arc AB (r1=1, r2=2). Express result to the accuracy of 3 decimal.
Correct answers: 43
The first user who solved this task is Roxana zavari.
#brainteasers #math
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What hapiness is

A man doesn't know what hapiness is until he's married.

By then it's too late.

Frank Skinner (January 28 1957-)

Picture: Reuters

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Electric railway device

In 1895, black American inventor William B. Purvis was issued a patent for a "Magnetic Car Balancing Device." In his life, Purvis held other patents for electric railway devices (1894, 1897), and he also patented ten paper bag machines (1884-94). Other patents were issued to him for a bag fastener (1882), a hand stamp (1883) and a fountain pen (1890).
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