An octahedron is a closed 3-d shape with 8 polygonal faces. There are 257 topologically different convex octahedra. It is possible for some of these faces to be right angled.
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An octahedron has eight faces. If it has 62 faces then it is not an octahedron!
equilateral triangle
A regular octahedron is one of the platonic solids. Each of its faces is an equilateral triangle.
Face left observation(In theodolite survey):If the face of the vertical circle is to the left of the observer, the observation of the angle is known as Face left observationFace Right observation(In theodolite survey):If the face of the vertical circle is to te right of the observer, the observation of the angle is known as Face right observation
yes it is called a octahedron