A cone
A triangular based pyramid has zero pairs of parallel faces. In a triangular based pyramid, all three faces of the base are not parallel to the apex, which means there are no pairs of parallel faces in this type of shape.
A heptahedron is a seven-faced polyhedron. The number of pairs of parallel faces in a heptahedron can vary depending on its specific shape and configuration. For example, a regular heptahedron, such as a truncated triangular prism, may have pairs of parallel faces, while other irregular heptahedra may not have any. Therefore, the answer is not fixed and can range from zero to multiple pairs based on the specific heptahedron in question.
ZERO!
ZERO!
Zero parallel faces in a triangular pyramid. There are four faces, and none of them are parallel to each other.
A scalene triangle has zero pairs of parallel sides. In a scalene triangle, all three sides are of different lengths, and there are no sides that are equal or parallel to each other. Each angle is also unique, contributing to its distinct shape.
Zero
Well, darling, an octahedron has 12 edges and 8 faces. So, to answer your question, it has zero parallel edges and faces. But hey, who needs parallel when you've got those sharp angles and sleek lines?
A trapezoid (in most cases)
a circle
An isosceles triangle has no parallel sides but it does have 2 sides of equal lengths
A nonagon, which is a polygon with nine sides, can have multiple pairs of parallel lines depending on how it is drawn. However, in a regular nonagon, no sides are parallel because all sides are of equal length and the angles are equal. In general, the number of parallel lines in any polygon depends on its specific arrangement and shape. Therefore, a nonagon can have zero or more pairs of parallel lines, but typically a regular nonagon has none.