OCTA - DOME 4a with Base Option
The four frequency Class 1 dome with normal orientation = square at top.
Tools - scissors and tape.
Cut out the four groups of triangles along the perimeter edge lines. Next bend the interior lines slightly by placing on a straight edge such as a table or counter edge and push down, making a slight crease. Follow the placement of triangle sections on the diagram to match edges and tape together on the inside of the dome. This gives the 4 frequency octahedral dome, 5/8 sphere (actually 5 of 8 levels of triangles), diameter about 7 inches. Cut off the bottom row of triangles to demonstrate the dome without the Base Option.
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