### Solid shapes and their nets - cube

In geometry, a cube is a three-dimensional solid object bounded by six square faces, facets or sides, with three meeting . Each symmetry form has a different Wythoff symbol. A cube has eleven nets (one shown above): that is, there are eleven ways to flatten a hollow cube by cutting seven edges. To color the cube so that. Different Tune Up and Feed Nurturing levels. You no longer have the same number of Sparks and Tokens. There are New People in Meet Cozmo. Cozmo needs. I am new to developing cubes for reporting purposes and What I commonly see is that budget data is created at a different you will often end up merging logic from several cubes into larger cubes as you go along.

Call on a student to stand in front of the class and state an attribute of the child the color of their hair, eyes, shoes, etc. Today we are going to learn about attributes of a cube. Tell the students that, as detectives, they will be describing the attributes of a cube.

Instructional Procedures As a class choose a two- or three-dimensional object in the classroom for example: Have the students come up with attributes while the teacher lists the attributes on the board.

Ask students to write the attributes in their math journals. Ask students to look around the room and name items that are shaped like a cube. Check before hand and make sure you have at least one or two cube shaped objects in the room! If it hasn't been brought up, ask students what two-dimensional shapes makes up the cube.

Next go over the attributes of a cube. List them on the board.

### Meet UP’s Rubik’s Cube Master - The Beacon

Have the students write them in their journals. Next have the students come up with why they think the cube shape is important.

Have them come up with an item in real life that is shaped like a cube and list the attributes. You can choose another net from above. Scale it up to the size you want, and put a tab on every other edge for gluing it together. It's certainly possible to make a cube from ordinary paper, but it will be fragile.

Don't sit on it by mistake!

## Attributes & Nets of a Cube

You can also use thin card. How about recycling packaging such as breakfast cereal packs? Draw out the design if you haven't printed it and cut it out carefully, using scissors that aren't blunt or covered with glue. Before gluing, it is important to fold the design, and it's easier to do this if you score the lines first. Use a ball-point pen to go over all lines in the design, including the tabs. The ball-point pen will make a mark so if you can find a ball point pen that doesn't work, that will be perfect.

Press quite heavily with the point of the pen, but don't tear the paper. Now fold the paper to make right angles, and you will see the cube start to appear. It doesn't matter which way you fold the design. Once you have scored the edges with the ball-point pen, you will find it easy to fold it either way. Use small dabs of glue to stick it, or it will end up very messy. Volume of a cube If the sides of a cube are length a, then the volume is a3 or a times a times a.

Cubic packaging Some cubic packaging is made of a single piece of card with some clever folding and gluing. Roll the paper or card into a cylinder and glue the edge to keep it like that. Put four folds in length-wise to make a rectangular cross-section to the cylinder. Pinch one end and glue it across.

**Factorisation: Sum or Difference of Cubes**

Pinch a fold across to give it a sharp edge. Do the same to the other end. The corners of the ends will stick out. To open the carton, you unfold one end and snip a corner. In fact, most food packages are cuboids rather than cubes. Cubic crystal It's easy to think of a cube as a very man-made shape, and that there are no cubes in nature. Well, you'd be wrong!

On the left is a pyrite crystal.

It is natural, not shaped by man, and it is definitely a cube. You might think that crystals are transparent and jewel-like, but there are many metallic crystals.

## Meet UP’s Rubik’s Cube Master

You can see a mini-crystal starting to grow on the top at a different angle. Moving cube Click on Move or Backwards to make cube move and Stop to stop it. A regular solid has all its faces the same shape, and a cube has squares.

Are there any other regular solid shapes made entirely with squares as faces? No, and we can prove this. Think about the vertices corners. For a regular solid, all the vertices must look the same, and what happens at the vertex corner defines the shape. To make a vertex, at least three faces must meet. If there were only two, they wouldn't be a vertex. For a cube, three vertices meet at each vertex. For a different shape, there must be more than three squares meeting.