Q:
# Why can't contour lines ever cross each other?

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### Quick Answer

**Contour lines do not cross each other because of the variance in elevation between the lines.** However, an instance where two contour lines intersect occurs when the elevations are simultaneously crossed at an identical point through a vertical ledge.

Contour lines are irregularly shaped patterns that typically form waves, concentric rings, loops or other oscillations that identify a meteorological quantity on a contour map. An "isobar" is associated with pressure, an "isotherm" with temperature, an "isotach" with the speed of wind and an "isodrosotherm" with dew point. The value of each atmospheric quantity is uniform along a contour line, hence, no two contour lines intersect.

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Q:
## What are some tips for geometry proof practice?

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Full Answer >**Some tips for geometry proof practice are to break the problem down into smaller pieces, to label all necessary points, lines and planes and to write down the reasoning for each step.**Another tip is to understand the proper use of examples in a mathematical proof.Filed Under: -
Q:
## How many lines of symmetry does a parallelogram have?

A:The number of lines of symmetry of a parallelogram depends on the type of parallelogram. A non-special parallelogram does not have any lines of symmetry. This includes any quadrilateral with two pairs of parallel and equal sides, except for rectangles, squares and rhombuses.

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Q:
## What are some real-life examples of parallel lines?

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Full Answer >**Parallel lines exist everywhere in everyday life, including on the sides of a piece of paper and the way that the shelves of a bookcase are positioned.**Parallel lines are two or more lines that when drawn out infinitely long never intersect.Filed Under: -
Q:
## What does "vertices" mean in math?

A:In geometry, a vertex is defined as a point where two or more lines meet. A triangle has three vertices. A parallelogram has four vertices. A six-sided figure has six vertices. A pentagon is a five-sided figure and has five vertices.

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