PerpendicularLine Postulate
Anotherpostulatethat is relevantto thesescenariosis thePerpendicularLine Postulate.
PerpendicularLine Postulate:Givena line and a pointnot on the line, thereis exactlyone line perpendic-
ular to the givenline that passesthroughthe givenpoint.
This postulateis very similarto the ParallelLine Postulate,but dealswith perpendicularlines.Remember
that perpendicularlines intersectat a right angle.So, as in the diagrambelow, thereis only one line
that can passthroughpoint whilebeingperpendicularto line.
Example 4
Drawa line throughpoint that is perpendicularto line.Rememberthat therecan only be one line perpendicularto that travelsthroughpoint. This line is
drawnbelow.