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Vertical Angles

Two congruent, non-adjacent angles formed by intersecting lines.

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Vertical Angles

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Vocabulary

Adjacent Angles

Two angles are adjacent if they share a side and vertex. The word 'adjacent' means 'beside' or 'next-to'.

Corresponding Angles

Corresponding angles are two angles that are in the same position with respect to the transversal, but on different lines.

Intersecting lines

Intersecting lines are lines that cross or meet at some point.

Parallel

Two or more lines are parallel when they lie in the same plane and never intersect. These lines will always have the same slope.

Perpendicular lines

Perpendicular lines are lines that intersect at a 90^{\circ} angle.

Supplementary angles

Supplementary angles are two angles whose sum is 180 degrees.

Vertical Angles

Vertical angles are a pair of opposite angles created by intersecting lines.

Vertical Angles Theorem

The Vertical Angles Theorem states that if two angles are vertical, then they are congruent.

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