Properties of Parallel and Perpendicular Lines

Name a line parallel to AD

(IGNORE NOTATION)

• EH

• AB

• DC

• HG

Name a line perpendicular to AD

(IGNORE NOTATION)

• EH

• AB

• CG

• HG

Name a line parallel to AB

(IGNORE NOTATION)

• EH

• DC

• AE

• FG

Name a line perpendicular to FG

(IGNORE NOTATION)

• EH

• DC

• AE

• FB

Two lines that are parallel will have ...

• Slope that is opposite reciprocals

• No slope

• Slope that is the same

• none of the above

Nonvertical lines are perpendicular if and only if their slopes are ​ (a)  

• negative reciprocals

• equal

The slopes of parallel lines are (a)  

• opposite reciprocals.

• opposites.

• the same.

• always 7.

Parallel lines have different ​ ​ (a)  

• y-intercepts

• slopes

• negative reciprocal slope

Name a line parallel to FG

(IGNORE NOTATION)

• EF

• DC

• AD

• FB

Lines DE, AB, and GC appear to be _________

(IGNORE NOTATION)

• parallel

• perpendicular

• skew