Transversal t intersects two parallel lines, a and b.

In geometry, a transversal line is a line that passes through two or more other coplanar lines at different points.

In Euclidean geometry if lines a and b are parallel, and line t intersects lines a and b, then corresponding angles formed by line t and the parallel lines are congruent.

Alternate exterior angles created by a transversal of two lines.

Alternate interior angles created by a transversal of two lines.

Alternate Angles

A transversal line creates funny angles. The alternate interior angles are on opposite sides of the transversal line and inside the lines being transversed. Alternate exterior angles are on opposite sides of the transferal line and outside the lines being transversed.

See this

A line which intersects 2 or more coplanar lines at different points is called a Transversal.

External links

• Transversal and Angles Interactive transversal with color coded angles (corresponding, alternate interior etc..)
• Definition and properties of a transversal line With interactive animation
• Corresponding angles associated with a transversal line With interactive animation
• Alternate interior angles associated with a transversal line With interactive animation
• Interior angles associated with a transversal line With interactive animation
• Exterior angles associated with a transversal line With interactive animation

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