![]() ![]() 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.You have these two faces that are circular and then they are opposite each other.The properties of 3D shapes are faces, edges and vertices. Thing that looks like a can is a cylinder. Which one is a sphere? When I think sphere, I think of a globe. Sometimes it'll be resting like this, sometimes it'll be on it's side, but this is a triangular prism. Have two opposite-facing sides that are triangles. In a square pyramid, theįaces which are triangles all meet at a point. This is actually what'sĬalled a triangular prism. You see this up here is a triangle and you see this down here is a triangle, although they're connectedīy these rectangular sides. If you look at this shape right over here, it has sides that are triangles. Here is rectangular on every side, and it's three dimensions. That is rectangular, notice, this shape right Three-dimensional object, and since it's saying a rectangular prism, well, the best one here Which one is a rectangular prism? A prism you can view as a If it's a triangular pyramid, then the base would only have three sides, but this is a square pyramid. So the base of this right over here is a square. It a square pyramid is the idea that its base is a square. This shape here on the rightĬlearly looks like a pyramid, and the thing that makes Really, this is just something to know, because some people in various subjects will sometimes throw out these words. Which one is a cylinder? Let's just work through this together. Which of these is a rectangular prism? Which one is a triangular prism? Which one is a sphere and What I want you to do is pause this video and think about which of these ![]()
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