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### Quick Answer

**Two adjacent angles whose non-common sides are opposite rays form a linear pair.** The two angles combine to be 180 degrees, and the two opposite rays create a straight line. The adjacent angles appear from a single ray that starts at the midpoint of the opposite rays.

The adjacent angles are supplementary in that they add up to 180 degrees. For instance, one angle can be 45 degrees and the other 135 degrees. If two congruent angles create a linear pair, they are right angles at 90 degrees each. Not all supplementary angles are linear pairs, but all linear pairs are supplementary angles. The two rays combine to form a straight line with one point that originates the ray for the linear pair.

There can be many linear pairs that originate from the same point along the two opposite rays. A ray is a line with a firm origination point that goes infinitely in one direction. The opposite rays start at one end point and go infinitely in opposite directions.

Linear pairs have real-world applications in chemistry as it relates to the structure of chemicals and molecules. Knowing the three-dimensional arrangement of atoms and molecules gives scientists clues as to a substance's reactivity, color, magnetism and biological activity.

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Q:
## How do you cut crown molding angles?

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Full Answer >**In order to cut crown molding into angles, first place the molding in a miter box upside down with the molding against the sides and bottom of the box like it is against the ceiling and wall.**Cut a 45-degree angle into the molding using a hand saw.Filed Under: -
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## What are two non-collinear rays with a common endpoint?

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Full Answer >**An angle is formed by the union of two non-collinear rays that have a common endpoint.**This endpoint is the vertex of the angle, and the two rays become the sides of this angle. These two rays can form different types of angles.Filed Under: -
Q:
## What does two liters equal?

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Full Answer >**According to the Exploratorium's measurement guide, 2 liters is approximately equal to 1/2 gallon or 8 cups.**Metric liters are converted to U.S. customary gallons by multiplying the number of liters by 0.264. The precise equivalence is 0.528 gallons.Filed Under: -
Q:
## How do you find the midpoint between two cities?

A:One of the primary reasons to use a map is to determine relative locations and distances of multiple points. To find the midpoint between two cities, you need a map that shows both cities and a ruler or other measuring tool.

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