including vertical, horizontal, parallel and perpendicular. What are parallel and perpendicular lines? Discover the difference between parallel and perpendicular lines. Measuring angles Find out ...

You can see that there are 4 vertical pencils and 4 horizontal pencils. A race! Oh, don't forget to stretch guys. Parallel lines ... Perpendicular lines cross at right angles.

An easy way to remember congruent angles is to relate the word "congruent" and to how that term is used in reference to parallel lines: Two parallel lines with the same measure are congruent.