
(a)
To calculate: The measure of
(a)

Answer to Problem 22WE
Explanation of Solution
Given information:
Formula used: Sum of two supplementary angle is equal to 180
Calculation:
Add the angles 1 and 2 and set it equal to 180. Substitute 27 for angle 1 and solve for angle 2. Substitute 27 for angle 3 as well.
Substitute it in the first equation
Substitute 27 degree for angle 3 and solve for angle 4
(b)
To calculate: The measure of angle 2 and angle 4 in terms of x
(b)

Answer to Problem 22WE
Explanation of Solution
Given information:
Formula used: Sum of two supplementary angle is equal to 180
Calculation:
Add the angles 1 and 2 and set it equal to 180 degree. Substitute x for angle 1 and solve for angle 2. Substitute x for angle 3 as well.
Substitute x for angle 3 and do the same
(c )
To prove: if two angles are congruent then their supplements are congruent
(c )

Answer to Problem 22WE
Yes , if two angles are congruent then their supplements are congruent
Explanation of Solution
Given information: :
Proof: Suppose angles 1 and 3 are congruent
We know that the sum of supplementary angles are 180 degree.
When two angles are congruent then they are equal
We know that ,
So the supplements angle 4 and angle 2 are congruent
Therefore, if two angles are congruent then their supplements are congruent
Chapter 2 Solutions
McDougal Littell Jurgensen Geometry: Student Edition Geometry
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