Depending upon the base, it will either have no parallel sides or up to (number of sides ÷ 2) sets of 2 parallel lines.
The number of angles depends upon the base and is 3 × (base + 1).
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If the two lines are parallel, then you get 4 pairs of vertical angles. If the two lines are not parallel, then we get 6 pairs of vertical angles.
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If there are only two parallel lines then 4 corresponding angles will be created
A triangular based pyramid has no parallel lines but it does have 4 faces, 6 edges and 4 vertices.
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