Crossword-Solution: BIPYRAMID
We have 1 clue for the answer “BIPYRAMID”
| Clue | Answers |
|---|---|
| geometrical form consisting of two pyramids with a common polygonal base | 1 answer |
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Poet’s word, with inverted comma, for the end of the day
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E
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Hint 1 meaning
The old plural of Eye.
Hint 2 anagram
ENE
Hint 3 another clue
AND STILL ___
18 +2
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Sentences with BIPYRAMID (5)
The simple forms are the same here as in the holosymmetric class, except the prism {hko}, which has only four faces, and the bipyramid {hkl}, which has eight faces and is distinguished as a "tetragonal pyramid of the third order." [Illustration: FIG.
Hexagonal pyramid (hkl) where (h - 2k + l = 0), of six faces, corresponding to the six upper or lower faces of the hexagonal bipyramid.
The form {hkl}, where h - 2k + l = 0, is also a rhombohedron, being the hemihedral form of the hexagonal bipyramid.
Combinations of Hexagonal forms.] Hexagonal bipyramid of the first order, bounded by twelve isosceles triangles (fig.
The hexagonal bipyramid so common in quartz is geometrically similar to this form, but it really is a combination of two rhombohedra, a direct and an inverse, the faces of which differ in surface characters and often also in size.