Find the area of the black region
[2917] Find the area of the black region - Find the area of the black region accurate up to 3 decimal places. (A=?, a=20, b=10) - #brainteasers #math #riddles - Correct Answers: 39 - The first user who solved this task is Sanja Šabović
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Find the area of the black region

Find the area of the black region accurate up to 3 decimal places. (A=?, a=20, b=10)
Correct answers: 39
The first user who solved this task is Sanja Šabović.
#brainteasers #math #riddles
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Davidson Black

Born 25 Jul 1884; died 15 Mar 1934 at age 49.Canadian physician and physical anthropologist who first postulated the existence of a distinct form of early man, popularly known as Peking man. In 1920 he had a position at a Peking, China, college which gave him opportunity to investigate nearby Chou K'ou-tien. In 1927 he found a single human molar which he took to be an indicator of a small-brained ancestor, dubbed Peking man. Subsequently, more teeth, skulls, bones, tools and campfire remains were found (1929-30). These are now classifieded as examples of Homo erectus.
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