C & I 499Assignment October 28, 2004James P. Dildine Using only the Triangles included in our GeoFix Kit build the following with the fewestnumber of triangles to make the polyhedron rigid. Photos are included.1. A Tetrahedron with edge length of one unit: 4 Triangles are used to make it with 3it is still rigid. 2. A Tetrahedron with edge length of two units: 16 Triangles are used to make itwith 13 it is still rigid.3. An Octahedron with edge length of one unit: 8 Triangles are used to make it with6 it is still rigid. 4. An Octahedron with edge length of two units: 32 Triangles are used to make itwith 26 it is still rigid. I created additional interesting figures, as well. A stellated decahedron with severaltetrahedra. And the same figure turned inside out. Each figure with 10 pentagons and