Assertion: tetrahedron | /r/HasProperty | formed
Facets:
Source sentences:
text: If four fluids, a, b, c, d, meet in a point 0, and if a tetrahedron AB CD is formed so that its edge AB represents the tension of the surface of contact of the liquids a and b, BC that of b and c, and so on; then if we place this tetrahedron so that the face ABC is normal to the tangent at 0 to the line of concourse of the fluids abc, and turn it so that the edge AB is normal to the tangent plane at 0 to the surface of contact of the fluids a and b, then the other three faces of the tetrahedron will be normal to the tangents at 0 to the other three lines of concourse of the liquids, an the other five edges of the tetrahedron will be normal to the tangent planes at 0 to the other five surfaces of contact.
text: Actually, this tetrahedron is formed when the atoms are arranged tetrahedrally i.e three spheres are arranged first and each sphere of the second layer is placed at the triangular void of the first three spheres and so when centres of the pour spheres are matched , they are found to be on the corners of a regular tetrahedron.