The complement of 60º is 30º.
The complement of 30º is 60º.
Method for Finding the Value of a Pronumeral
To find the value of the pronumeral from the given information, write
an equation. Then solve the equation and write the answer in words.
Example 1
What is the complement of 40º?
##### Solution:
Example 2
What is the supplement of 35º?
##### Solution:
**
**
Example 3
Use the information given in the diagram to find *x*.
##### Solution:
So, the value of *x *is 133.
Example 4
Use the information given in the diagram to find *x*.
##### Solution:
So, the value of *x *is 15.
Angles at a Point
###### Recall that:
The **sum of all angles** that **meet at a point** is equal to
360 degrees.
Example 5
Use the information given in the diagram to find *x*.
##### Solution:
So, the value of *x *is 66.
Key Terms
adjacent angles, adjacent
angles forming a straight line, supplementary angles, complementary angles, angles at a
point |