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A heptahedron is a closed 3-d shape with 7 polygonal faces. There are 34 topologically different convex heptahedra and, since none of these are regular, the term is ambiguous. There can be:
- no parallel edges,
- five pairs of parallel edges and two quintet,
- three quartets,
- two pairs and one triplet
as well as many other combinations.
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Earn +20 ptsQ: How many parallel lines does a heptahedron have?
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What is a pentagonal heptahedron?
A pentagonal heptahedron is a heptahedron comprising two pentagons which are joined to one another by five quadrilaterals. There is no requirement for the pentagons to be congruent nor for them to be parallel to one another.
How many lines of parallel lines does a square have?
A square has 2 pairs of opposite parallel lines.
How many pairs of parallel line does a triangle have?
There cannot be parallel lines in any [plane] triangles.
How many parallel lines does a triangular prism have?
A triangular prism has 9 parallel lines
How many sets of parallel lines are in a square?
there are 2 sets of parallel lines in a square
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