Circles are round, closed shapes with a constant radius, while parallel lines are two or more lines that never intersect and are always the same distance apart.
If two lines have the same slope, they are parallel. You can also use a ruler to measure the distance between the lines at different points and see if the distance remains the same.
The equation for a circle is (x - a)^2 + (y - b)^2 = r^2, where (a,b) is the center of the circle and r is the radius.
Only one parallel line can be drawn to a given line through a given point. This is because parallel lines never intersect, so there can only be one line that is the same distance from the given line at a specific point.
No, circles and lines cannot be parallel. A circle is a curved shape, while a line is a straight shape, so they can never have the same distance between them at all points.