PyramidĪ pyramid is a solid whose base is a flat rectilinear figure and whose side faces are triangles having a common vertex outside the surface of the base. In figure, ABC, DEF, ABDE, AEFC, BDFC are faces.Ĭube and cuboid are also called square prism and rectangular prism respectively. The edges are AB, BC, AC, DE, EF, FD, BD, CF and AE. A ridge tent is an example of a triangular prism. Remember that if the bases of the prism are pentagon, then the prism is known as pentagonal prism.Ī triangular prism is made up of two triangles at each end and three rectangles. A cone has one curved face, and one flat face.Ī solid (3-D) shape that has only a curved surface is called sphere.Ī prism is a solid whose bases are identical polygon faces (triangles, quadrilaterals, pentagons etc.) and the other faces are rectangles.A cylinder has one curved face and two flat faces (in figure F 1 and F 2).Ī cone is a solid shape having a plane circular end as the base and whole lateral surface is the curved surface tapering into a point, called the vertex of the cone.A cylinder has two curved edges (in figure C 1 and C 2).It is the shape of a tube light, tin container, circular pillars, circular pipes, circular pencils, measuring jars, road rollers and gas cylinders etc. 8 vertices are A, B, C, D, E, F, G, H.Ī solid shape in which top and bottom both are circular while the rest of the surface is curved. In figure, 12 edges are AB, BC, CD, DA, EF, GH, FG, EH, CG, BF, AE, DH. In figure, ABCD, EFGH, ADHE, BCGF, ABFE, DCGH are faces. Length breadth and height of a cube are equal. A cube is made up of square faces.ĭefinition : A cuboid whose length, breadth and height are all equal, is called a cube. In figure 8 vertices are A, B, C, D, E, F, G, H. Vertices: Three edges of a cuboid meet at a point, called a vertex.In figure edges are AB, BC, CD, DA, EF, GH, FG, EH, CG, BF, AE, DH. Edges: Two adjacent faces of a cuboid meet in a line segment, which is called edge of the cuboid.Ī cuboid has 12 edges.In figure ABCD, EFGH, ADHE, BCGF, ABFE, DCGH are faces. The opposite faces of a cuboid are identical. Faces: A cuboid has 6 rectangular faces.It has three dimensions, namely length, breadth and height. It is the shape of a matchbox, a chalk box, a brick, a tile, a book, an almirah etc.ĭefinition:A solid bounded by six rectangular faces (not all equal) is called a cuboid. Those objects you can see or touch has 3-dimensions as length, breadth, and height, for example, room, TV, chair, etc. In the world around us, there are many 3-dimensional geometric shapes. A solid occupies a fixed amount of space and has three dimensions. The objects having definite shape and size are called solids. which require three dimensions i.e.length, breadth and height or depth are called solid figures or 3-dimensional figures. The shapes like cube, cuboid, cylinder, pyramid, cone etc. The figures which can be described by mentioning two dimensions called length and breadth, are called 2D-shapes or plane figures.Įxample: Triangle, quadrilateral, and other polygons are all 2-dimensional figures.
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