When two parallel lines are cut by a transversal line, eight angles will be formed, like this:
In such a situation, you can identify four types of angle pairings: alternate exterior angles, alternate interior angles, corresponding angles, and same-side interior angles.
Alternate Exterior Angles
1 and 8 are also alternate exterior angles |
Alternate Interior Angles (Z-pattern)
4 and 5 also form the z-pattern |
Corresponding Angles (F-pattern)
(2,6), (3,7) and (1,5) also form the f-pattern |
Same-Side Interior (C-pattern)
3 and 5 also form c-pattern |
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Yes... that's it. Not much explanation.