If two straight lines intersect, four angles are created so that the intersection is the vertex for each angle. When two of the angles have a common vertex and share a common side, they are called adjacent angles. The pairs of neighboring angels in the figure above are ?e and ?a.

If two angles divide, they are considered neighbouring angles :- Common arm and following diagram shows neighbouring angles?

## Adjoining angle | Mathematics Wiki

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## Calculation of the size of angles

Total of adjacent angles that form a line is 180º. These two angles are also referred to as additional adjacent angles. In the following, additional angles are presented. To find the x. answer, use the information in the graphic: To find the x. answer, use the information in the graphic: Adding up the two angles to 180°, the angles are considered complementary.

A surcharge of 40º is 140º. A surcharge of 140º is 40º. In order to find the value of the pronumer from the given information, type an expression. SOLUTION Then resolve the problem and put the answers in words.