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6 godz. temu · The area of an ellipse with semi-major axis a and semi-minor axis b is πab. The volume of a sphere with radius r is 4 / 3 πr 3. The surface area of a sphere with radius r is 4πr 2. Some of the formulae above are special cases of the volume of the n-dimensional ball and the surface area of its boundary, the (n−1)-dimensional sphere, given ...
6 godz. temu · So, if the area is 36m², we can find the length of one side by taking the square root of the area. The square root of 36 is 6, so each side of the square is 6m long. Next, we know that the perimeter of a square is calculated by multiplying the length of one side by 4 (Perimeter = 4 * side). So, if each side is 6m, the perimeter is 4 * 6 = 24m.
1 dzień temu · The latter is impossible because a is a real number and the first equation would imply that a 2 = −1. Therefore, a = 0 and b 2 + c 2 + d 2 = 1. In other words: A quaternion squares to −1 if and only if it is a vector quaternion with norm 1. By definition, the set of all such vectors forms the unit sphere.
6 godz. temu · Engineers use area calculations to determine the size of structures and the amount of material needed for construction. ... To find the area of a circle, you use the formula: area = pi x radius^2, where pi is a mathematical constant approximately equal to 3.14. The radius of the circle is the distance from the center of the circle to any point ...
6 godz. temu · Proportional representation (PR) refers to any type of electoral system under which subgroups of an electorate are reflected proportionately in the elected body. The concept applies mainly to political divisions (political parties) among voters.The essence of such systems is that all votes cast – or almost all votes cast – contribute to the result and are effectively used to help elect ...
1 dzień temu · Jules Henri Poincaré (UK: / ˈ p w æ̃ k ɑːr eɪ /, US: / ˌ p w æ̃ k ɑː ˈ r eɪ /; French: [ɑ̃ʁi pwɛ̃kaʁe] ⓘ; 29 April 1854 – 17 July 1912) was a French mathematician, theoretical physicist, engineer, and philosopher of science.He is often described as a polymath, and in mathematics as "The Last Universalist", since he excelled in all fields of the discipline as it existed ...
