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Concept explainers
To prove: If two lines form congruent adjacent
![Check Mark](/static/check-mark.png)
Answer to Problem 2WE
Explanation of Solution
Given information: Adjacent angles 1 and 2 are congruent.
Proof:
Adjacent angles are in a straight line. So the sum of angles is 180 degree. Then substitute angle 2 instead of angle 1.
In step 4 apply the division property of equality. Divide both sides by 2 .
By the definition of perpendicular lines, the line l is perpendicular to n because angle 1 and angle 2 are 90 degrees.
Chapter 2 Solutions
McDougal Littell Jurgensen Geometry: Student Edition Geometry
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- Elementary Geometry For College Students, 7eGeometryISBN:9781337614085Author:Alexander, Daniel C.; Koeberlein, Geralyn M.Publisher:Cengage,Elementary Geometry for College StudentsGeometryISBN:9781285195698Author:Daniel C. Alexander, Geralyn M. KoeberleinPublisher:Cengage Learning
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