Vertical Angle Theorem Proof

[yyeppesz]

For those taking Geometry in High School:

1.<PTQ and <QTR are linear pair ...... given

2.<QTR and <RTS are linear pair ......given

3.m<PTQ + m<QTR=180 ...... linear pair postulate

4.m<QTR + m<RTS=180 ...... linear pair postulate

5.m<PTQ + m<QTR=m<QTR + m<RTS......substitution prop

6. m<PTQ =m<RTS ...... subtraction prop

7. <PTQ congruent <RTS ...... deinition of congruent angles

[SamKeepsitReal]

you're hot and smart ;) lols

[sportnov]

You explained this very well, but i was kind of waiting for you to show, how you did the calculation?

If measurement <QTR= (180 - X) then that means to find the other side we'll have to: take the entire degree of a circle (360-180) = 180...Am i correct?

I'm kind of new to calculating angels :D let me know if i was right? Thanks.

[paras142]

thanx men  you r brilliant

[thejyz]

great!