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Many mathematical problems have been stated but not yet solved. These problems come from many areas of mathematics, such as theoretical physics, computer science, algebra, analysis, combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, model theory, number theory, set theory, Ramsey theory, dynamical systems, and partial differential equations.
Obesity is a medical condition, sometimes considered a disease, [8] [9] [10] in which excess body fat has accumulated to such an extent that it can potentially have negative effects on health. People are classified as obese when their body mass index (BMI)—a person's weight divided by the square of the person's height—is over 30 kg / m 2 ...
In blue, the point (4, 210°). In mathematics, the polar coordinate system specifies a given point in a plane by using a distance and an angle as its two coordinates. These are the point's distance from a reference point called the pole, and; the point's direction from the pole relative to the direction of the polar axis, a ray drawn from the pole.
Bangladesh has a literacy rate of 74.7% per cent as of 2019: 77.4% for males and 71.9% for females. [ 238 ] [ 239 ] The country's educational system is three-tiered and heavily subsidised, with the government operating many schools at the primary, secondary and higher secondary levels and subsidising many private schools.
The dihedral angle of a pentagonal antiprism between pentagon-to-triangle is 100.8°, and the dihedral angle of a pentagonal pyramid between the same faces is 37.4°. Therefore, for the regular icosahedron, the dihedral angle between two adjacent triangles, on the edge where the pentagonal pyramid and pentagonal antiprism are attached is 37.4 ...
A major change was the modern piece movement rules, which began to appear in intellectual circles in Valencia, Spain, around 1475, [note 4] which established the foundations and brought it very close to current chess. These new rules then were quickly adopted in Italy and Southern France before diffusing into the rest of Europe.
Despite these adversities, economic growth in 2009–2010 reached a respectable 4.1%, with positive contributions from various sectors, including a 2% growth in agriculture, 4.9% growth in industrial output, 4.4% growth in large-scale manufacturing, and a 4.6% expansion in the services sector.