Drawing a Cube

Start the program, right click on the little man and erase him!

Now click on the rectangle tool.

Now left click on the origin and start a rectangle.

Now use the value entry box to type in 3,3. This should give a 3m square.

I set metres as the default measurement unit on installation. You can get at the units in the windows/preferences menu.

Select the system preferences menu and pick your favourite units.
The current measurement is displayed in the little box at the bottom RH corner of the screen.

Your square should look like this.

Now click on the Push/Pull (extrude) tool.

Left click on the top of the square and drag it upwards to extrude a cylinder of height 3m. Use the data box to enter 3m exact.

I have altered the view of the cube so that I can see the lines making it up. Do this with the view/face style menu.

The cube should now look like this.

Use the orbit, zoom and pan controls to change your view of the cube.

Showing symmetry planes.

A cube has nine symmetry planes. A symmetry plane is a flat surface which cuts right through the cube forming two halves which are mirror images of each other.

To add the first symmetry plane use the pencil tool to join the midpoints of opposite edges of the top face.

The cube should now look like this.

Now carry the plane on, down through the cube, using either the pencil to draw lines to the midpoints of the other edges or use the rectangle tool based on the line you have already drawn.

The cube should now look like this.

Three symmetry planes added.

Add the remaining six planes. You could make other solids and draw the symmetry planes onto them.