08.	+Vertical+Angle+Theorem

===**Summary:** **The vertical angle theorem states that all vertical angles are congruent. Vertical angles form when two lines, rays, or segments cross each other in an “X”. Vertical angles are not adjacent. The two angles that are vertical to each other are always equal in measure. Our goal is to teach you how to understand vertical angles so you will be able to apply what you learned to tests, quizzes, worksheets, or the midterm.**===

SAMPLE PROBLEMS Question 1- 4x + 7 = 131 4x = 138 x = 34.5
 * Find x**

Question 2 -

3x+20=10x-15 20=7x-15 35=7x x=5

Question 3 -

3y=4y-35 -1y=-35 y=35
 * Find Y and Z**

3(6z+7)=10z+45 18z+21=10z+45 8z+21=45 8z=24 z=3


 * Links **
 * 1) []
 * 2) http://www.mathsisfun.com/geometry/vertical-angles.html
 * 3) []