Radius of a sphere placed in a square equals , find a volume of a square.
Find the volume of a tetrahedron with the side of the basis equal to .
Calculate a volume of the pyramid, with a rhombus in the basis with diagonals and , and a height of a pyramid .
A side of the basis of the triangular pyramid equals , apothem . Find an area of the side of the pyramid.
Calculate a volume of a cylinder, if its height is , and an area of the basement .
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