Parallel Lines Formulas and Notes
Parallel Lines
Lines in a plane that do not meet. They are the same distance apart over their entire length.
Transversal
A line that crosses parallel lines is called a transversal.
Interior and Exterior Angles
Consecutive Interior Angles
\displaystyle a + b = 180 \degree
\displaystyle c + d = 180 \degree
Alternate Exterior Angles
\displaystyle a = b
\displaystyle c = d
Alternate Interior Angles
\displaystyle a = b
\displaystyle c = d
Corresponding Angles
\displaystyle a = b, c = d
\displaystyle e = f, g = h
