Drawing a Ten Sided Dice or Decaeder in Google SketchUp

I want to make a wooden dice with 10 sides for a party game. Because I never done it before, I will start to draw the shape in SketchUp, I think it will help me a lot in the woodworking.

Step 1: Drawing a Polygon

First I will use the Polygon from the Shape tools and I introduce manually 10 to obtain a 10 sided polygon. I draw the polygon with 60 mm radius. After that I draw a perpendicular line which length must be equal with the radius of the polygon. Let's group all these elements.

Step 2: Create the Decaeder

Now must to connect every second angle of the polygon with each other and then with the top of the perpendicular line. In this way we have a five sided shape above the 10 sided polygon. I proceed similarly on the upper side to have also a five sided polygon, but this time i will use the other 5 corners of the angles. Now we have some useless line, these was the original contour of the 10 sided polygon, now i will delete them all. You can see, we have basically two identical shapes, probably it will be possible to obtain these by other method also.

we must make a few more steps to finish. I think I will must to prolong all these sides because they must to intersect each other. Also I delete some line that are not useful for me. The top is ready, now I will proceed the same way below. Deleting the central lines, because we need just one line, which is the intersection line between all these faces, this is what I have to draw now. When I have this line I have one step left, to delete all other lines outside the main shape. This is our final object, how you can see, this is now a shape of a real 10 sided dice. Let’s put some colour on the faces and we are ready