High Quality Content by WIKIPEDIA articles! In mathematics, solid geometry was the traditional name for the geometry of three-dimensional Euclidean space — for practical purposes the kind of space we live in. It was developed following the development of plane geometry. Stereometry deals with the measurements of volumes of various solid figures including cylinder, circular cone, truncated cone, sphere, and prisms. The Pythagoreans had dealt with the regular solids, but the pyramid, prism, cone...
High Quality Content by WIKIPEDIA articles! In mathematics, solid geometry was the traditional name for the geometry of three-dimensional Euclidean space — for practical purposes the kind of space we live in. It was developed following the development of plane geometry. Stereometry deals with the measurements of volumes of various solid figures including cylinder, circular cone, truncated cone, sphere, and prisms. The Pythagoreans had dealt with the regular solids, but the pyramid, prism, cone and cylinder were not studied until the Platonists. Eudoxus established their measurement, proving the pyramid and cone to have one-third the volume of a prism and cylinder on the same base and of the same height, and was probably the discoverer of a proof that the volume of a sphere is proportional to the cube of its radius.
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Под одной обложкой собраны две работы выдающегося польского гуманиста, педагога и писателя Януша Корчака. "Право ребенка на уважение", впервые опубликованное в Варшаве в 1929 году, называют манифестом "педагогики сердца" - программным сочинением Корчака, в котором он изложил свои основные взгляды на воспитание детей. Цикл "Как любить ребенка" включает четыре самостоятельных сочинения: "Ребенок в семье",...
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