**Supplement of an Angle**

The supplement of an angle is defined as the angle that, when added to the given angle, results in a sum of 180 degrees. In other words, the supplement of an angle is the angle that completes a straight line with the given angle.

**Given Angle: 7 buy 8 Right Angle**

To find the supplement of the given angle, we first need to understand what is meant by "7 buy 8 right angle." The term "buy" is not a recognized mathematical term when it comes to angles. However, assuming that "buy" means "by" or "times," we can interpret "7 buy 8 right angle" as 7 multiplied by 8 right angles.

**Conversion of Right Angles to Degrees**

One right angle is equal to 90 degrees. Therefore, to determine the given angle in degrees, we need to multiply 7 by 8 and then multiply the result by 90.

7 buy 8 = 7 * 8 = 56

56 right angles * 90 degrees = 5040 degrees

Hence, the given angle is 5040 degrees.

**Supplement of the Given Angle**

To find the supplement of the given angle, we subtract the given angle from 180 degrees because the sum of an angle and its supplement is always 180 degrees.

Supplement = 180 degrees - Given Angle

Supplement = 180 degrees - 5040 degrees

Supplement = -4860 degrees

The supplement of the given angle, 7 buy 8 right angle, is -4860 degrees.

**Explanation**

In this problem, we assumed that "buy" meant "times" or multiplication. However, it is important to note that this interpretation is based on an assumption as the term "buy" is not a recognized mathematical term. It is always recommended to clarify the meaning of terms to avoid any misunderstanding or confusion. Additionally, angles are typically measured in positive degrees, so the negative value of the supplement may not be practically applicable.