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Find the area of the shaded figure

Express result to the accuracy of 3 decimal.

Correct answers: 22

The first user who solved this task is Djordje Timotijevic.

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True Love

Boyfriend: "Honey, on this Valentine's Day, I want to tell you something... I'm not rich like Robert. I don't have a mansion like Gary. I don't have a Porsche like Martin. But I do love you and I want to marry you."
Girlfriend: "Oh dear, I love you too... what was that you said about Martin?"

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Karl Karlovich Klaus

Died 24 Mar 1864 at age 68 (born 23 Jan 1796).Russian chemist and biologist whowas born and died in Russia, but wasof German origin, so is also known as Carl Ernst Claus. He discovered ruthenium (1844), which was the last dense, inert, platinum-like metal to be found. He earned degrees in chemistry, then a Ph.D. in pharmacy, but Klaus gained an international reputation for his researches on the platinum metals (osmium, palladium, iridium, and rhodium). His discovery of ruthenium resulted from an analysis of the waste residues of the platinum refinery in St. Petersburg. He named the element from Ruthenia, the Latin name for Russia. Klaus also investigated flora and fauna of Volga steppes.

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