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Find the area of the purple shaded region

Find the area of the purple shaded region. Express result to the accuracy of 3 decimal.

Correct answers: 45

The first user who solved this task is Sanja Šabović.

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Chris Rock: Invading a Country with Oil

Let me get this straight. We invade a country with oil, but gas costs more? That dont make no f**king sense! Now I didnt go to no fancy school or nothing, but Ill tell you this right now -- if I invade Kentucky Fried Chicken, wings will be cheap at my house.

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Luigi Cremona

Died 10 Jun 1903 at age 72 (born 7 Dec 1830).Antonio Luigi Gaudenzio Giuseppe Cremona was an Italian mathematician who was an originator of graphical statics (the use of graphical methods to study forces in equilibrium) and work in projective geometry. Cremona's work in statics is of great importance and he gave, in a clearer form, some theorems due to Maxwell. In a paper of 1872 Cremona took an idea of Maxwell's on forces in frame structures that had appeared in an engineering journal in 1867 and interpreted Maxwell's notion of reciprocal figures as duality in projective 3-space. These reciprocal figures, for example, have three forces in equilibrium in one figure represented by a triangle while in the reciprocal figure they are represented by three concurrent lines.

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