With cylinders containing circles and spheres being rounded in appearance, it can be common to mix these two shape names up. Toilet rolls are also common cylindrical objects but they do not have the top and bottom circular faces that a true cylinder should have. The curved face of a cylinder forms a rectangle when it is rolled out flat and the net of a cylinder can help to show this.Įveryday objects that are cylinders include food tins and batteries. This is because it has only 2 edges and the 2 edges do not meet each other. When viewed from the top or bottom, a cylinder looks circular.Ī cylinder has 2 curved edges that wrap around the circular faces on the top and bottom of the shape.Ī cylinder has no vertices. The cylinder has two identical circular faces on the top and bottom. A curved surface wraps around the outside of these 2 faces. The top and bottom faces are flat and circular. Whilst the net may be useful to help visualise the shape, we recommend using a ball or perfect sphere for this exercise as the net will be very difficult to make spherical with no clear edges or vertices.Ī cylinder has 2 flat faces, 1 curved surface, 2 circular edges and no vertices. It can help to pick up a spherical object and feel for edges and vertices. This means that it feels smooth to touch all the way around. A sphere is a shape that contains no edges or vertices. A sphere is a 3D circle.Ī sphere is ball-shaped and is perfectly round, which means that it is not longer in a particular direction than any other.Ī sphere contains no flat faces but it has one continuous curved surface. The opposite faces on a cuboid are equal and can be coloured in the same colour on your net.Ī sphere has 1 curved surface, 0 flat faces, 0 edges and 0 vertices. When teaching 3D shape names, it is worth comparing a cube and cuboid alongside each other to identify the differences between the two. The difference between a cube and a cuboid is that a cube has equal edge lengths, whereas a cuboid is longer in at least one direction. This is because a cube is a special type of cuboid that has all of its edges the same size. It has 4 around the top rectangular face and 4 around the bottom rectangular face.Ī cuboid has the same number of faces, edges and vertices as a cube. It also has 4 vertical edges connecting the vertices of the top rectangular face to the 4 vertices of the bottom rectangular face.Ī cuboid has 8 vertices. It has 4 horizontal edges around the top rectangular face and 4 horizontal edges around the bottom rectangular face. ![]() ![]() The opposite faces on a cuboid are equal in size.Ī cuboid has 12 edges. A cuboid is also known as a rectangular prism.Ī cuboid has 6 rectangular faces. It is an elongated cube.Ī cuboid is a 3D box shape and it has rectangular faces. There are 4 vertices on the top square face and 4 vertices on the bottom square face.Ī cuboid has 6 faces, 12 edges and 8 vertices. There are also 4 vertical edges connecting the top square face to the bottom square face. There are 4 horizontal edges around both of the top and bottom square faces. There are 12 edges on a cube, which are all the same length. All of its edges are the same length.Įach of the 6 faces of a cube is square-shaped because all of its edges are the same size. Marking the faces, edges and vertices as you count them is important as it can be easy to count them twice or miss one out.Ī cube has 6 faces, 12 edges and 8 vertices. You could put a sticker or piece of plasticine on each vertex as you count it. You can mark each edge as you count it by drawing a line on each one. You can colour in each face a different colour, or write a number from 1 – 6 on each square face. When teaching this topic, it can be helpful to count the number of each property on the net before assembling it. Alternatively, there are some online interactive 3D shapes in the practice section above that you can use to count the faces, edges and vertices. There are also printable nets for each 3D shape above that can be downloaded and assembled to accompany this lesson. When teaching the properties of 3D shapes, it is worth having a physical item to look at as you identify and count each property. All three dimensional shapes have the the three dimensions of length, width and depth.Ī shape is 3D if it can be picked up and held in real-life. The following table lists the number of faces, edges and vertices for some common 3D shapes:ģD is short for three-dimensional. The poster below shows the faces, edges and vertices of 3D shapes labelled on a cube. Vertices are the corners of a 3D shape formed where two or more edges meet.įor example, a cube has 6 faces, 12 edges and 8 vertices.Edges are the lines where two faces on a 3D shape meet.Faces are the flat or curved surfaces that make up the outside of a 3D shape.The properties of 3D shapes are faces, edges and vertices.
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