An angle is considered adjacent when they have an angle and a vertex in common, at the same time that its other sides are opposite rays, in turn the adjacent angles can be consecutive and supplementary, since when joined they resemble a flat angle, without have an inner point in common.
They are considered supplementary because adding them equals 180º. The property of angles is that they are supplementary. Among the properties that comprise the adjacent angles we have:
- The sinuses of the angles are equal.
- The cosines of the angles are equal but have an inverse sign.
- In turn, the adjacent internal angles could be broken down as follows:
- The complementary angles, are two angles that add them to the their measurements 90
- The supplementary angles are two angles that when added together their measurement is 180º.
- The conjugate angles are two angles that when added together, their measurement is 360º.
In English the name of "adjacent angles" is given to the pairs of consecutive angles, even if they are not supplementary. It is very important that when reviewing the different geometry or mathematics texts where the subject of angles is mentioned, it is necessary to bear in mind in which terms said content is being used or addressed, since in some texts adjacent angles are called consecutive angles. The adjacent angles have determined a side and a vertex in common causing their other sides to be derived in two opposite rays, some incorporate between the adjacent angles those that share a side and the vertex, although they are not supplementary.
