Which 3-D shape is that? Learn to identify the shapes of things around us | Teach 3-D shapes easily
What is a 3D shape? Image result for 3-d shapes In geometry, a three-dimensional shape can be defined as a solid figure or an object or shape that has three dimensions – length, width and height. Unlike two-dimensional shapes, three-dimensional shapes have thickness or depth. What are 3 examples of a 3D shape? Image result for 3-d shapes Some of the examples of 3D shapes are cube, cuboid, cone, cylinder, sphere, pyramid, prism, and so on. The attributes of a three-dimensional figure are faces, edges and vertices. The three dimensions compose the edges of a 3D geometric shape. A cube is a solid or three-dimensional shape which has 6 square faces. The cube has the following properties. All edges are equal 8 vertices 12 edges 6 faces Cuboid A cuboid is also called a rectangular prism, where the faces of the cuboid are a rectangle in shape. All the angles measure 90 degrees. The cuboid has 8 vertices 12 edges 6 faces Prism A prism is a 3D shape which consists of two equal ends, flat surfaces or faces, and also has identical cross-section across its length. Since the cross-section looks like a triangle, the prism is generally called a triangular prism. The prism does not have any curve. Also, a prism has 6 vertices 9 edges Pyramid A pyramid a solid shape, whose outer faces are triangular and meet to a single point on the top. The pyramid base can be of any shape such as triangular, square, quadrilateral or in the shape of any polygon. The most commonly used type of a pyramid is the square pyramid, i.e., it has a square base and four triangular faces. Consider a square pyramid, it has 5 vertices 8 edges 5 faces Cylinder A cylinder is defined as a three-dimensional geometrical figure which has two circular bases connected by a curved surface. A cylinder has No vertex 2 edges 2 flat faces – circles 1 curved face Cone A cone is a three-dimensional object or solid, which has a circular base and has a single vertex. The cone is a geometrical figure that decreases smoothly from the circular flat base to the top point called the apex. A cone has 1 vertex 1 edge 1 flat face – circle 1 curved face Sphere A sphere is a three-dimensional solid figure which is perfectly round in shapes and every point on its surface is equidistant from the point is called the center. The fixed distance from the center of the sphere is called a radius of the sphere. A sphere has No vertex No edges 1 curved face
