When a pair of parallel lines meet an intersecting transversal, pairs of angles with particular properties are made. Corresponding angles are equal. The lines make an F shape. Notice that the F ...

Parallel lines are indicated by arrows going in ... The Z-shape can be backwards, sideways or upside down. Corresponding angles occur at the same position within each intersection.

With both parallel lines cut, the adjacent angles and corresponding sides will share the same shape created by the line segment. This theorem builds on the same principles as the concept of the ...