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Presumably the questions refer to contour lines.
If that is the case, the answer is as follows:
Contour lines are lines drawn at selected heights on a map. They are lines that join points at the same height above the meas sea level.
A gentle slope is one that does not rise (or fall) as rapidly as a steep slope. That is to say, you have to travel a greater horizontal distance to gain (lose) the same amount of vertical distance or height. So, with a gentle slope, you have to travel a greater distance to get from one contour to the next and so the lines are less close together.
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How are contour lines shown for a gentle slope?
Contours for a gentle slope are spaced equally and far apart, the closer the contour lines the steeper the slope.
What is a gentle slope?
When the contour lines are farther apart, this means that the slopes between them are gentle. On the other side, if the contour interval is smaller, the slope will be steep.
How do you calculate parallel and perpendicular lines in a given plane?
Take any two lines and look at their slopes. -- If the slopes are equal, then the lines are parallel. -- If the product of the slopes is -1, then the lines are perpendicular.
Have slopes that are the same?
same slopes = parallel lines
Would perpendicular lines have negative or positive slopes?
I believe they have Negative Slopes as stated by my Geometry Book. "Perpendicular Lines Have Slopes Which Are Negative ___"
