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The usual definition is that the lines should be straight. On "alternative geometries", other definitions may be used. For example, on a sphere, the large circles (the largest you can make, whose center is the center of the sphere) replace straight lines. Note that in this case, the normal parallel axiom is no longer valid.
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Different types of lines in mathematics?
Different types of lines are :parallel lines, intersecting lines, perpendicular lines,oblique lines, vertical lines, horizontal lines, zigzag lines, curved lines ,wavy lines, and dashed or dotted lines.
Does perpendicular have parallel lines?
= parallel + perpendicular As such no, perpendicular lines do not naturally have parallel lines. However...connect the lines in the symbols below. ++ ++ And you'll have 4 perpendicular lines, and 4 parallel lines.
Can parallel lines be intersecting lines?
No, parallel lines do not intersect, and never will.
What 3d shapes have a curved surface and two parallel congruent circular bases?
A cylinder has two parallel congruent faces and a curved surface.
Do parallel lines meet at a 30 dregrese angle?
Lines that meet are not parallel, and parallel lines never meet.
