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numbers and algebraic expressions
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trigonometry
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analytic geometry
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combinatorics
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elements of statistics
kropki game

a - edge of cube. The cube has 6 faces, 12 edges, 8 vertices. The cube is prism which all faces are squares. Angles in a cube. Space diagonal: d = a√3, Volume: V = a^3, Surface: S = 6a^2.