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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An Unusual Nativity

A religious education class was almost finished making their models of the nativity scene and one little boy had done a lovely job. Some animals, Mary, Joseph, three wise men, and shepherds were all there. However, the teacher noticed an extra, rather overweight man in the scene as well.“Who is that person?” she asked.“Oh, that’s Round John Virgin.”
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Giacomo Doria

Born 1 Nov 1840; died 19 Sep 1913 at age 72.Italian naturalist and explorer who conducted important research in systematic zoology. Pursuing his work, he made expeditions to Persia (1862), Borneo (1865-66) and Tunisia (1879). In 1867, he founded the civic museum of natural history in Genoa. The collection he donated became the nucleus of the museum, which he directed for more than 40 years. He was also director of Societa Geografica Italiana (1891-1900). The museum he founded now contains important zoolological, paleontological, botanical, and mineralogical collections from all over the world. These collections are continually growing, now estimated to be more than 3.5 million exhibits.
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