Practice Test
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Angles on the opposite sides of the intersection of two lines are vertical angles.
Classification: Vertical angles
Value of x: 113
Because the angles in the diagram are on opposite sides of an intersection of two lines, we know that the angles are vertical. The measures of these angles are equal to each other by the Vertical Angles Theorem. 113^(∘) = x^(∘) This means that x is equal to 113!