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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Hale telescope

In 1948, the 200-inch (5.08 m) reflecting Hale telescope at the Palomar Mountain Observatory in California was dedicated. This was the first in the world with a 200-inch lens, which after casting was permitted to cool slowly over an 11 month period. The resulting 20-ton glass disk then required years years of careful grinding and polishing, interrupted by WW II. The telescope was officially named after Dr. George Ellery Hale who conceived, designed and promoted this telescope, though he died before it was completed. On 1 Feb 1949, studies first began with observations were first made of the constellation Coma Berenices.
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