ehm.. a short maths quiz for you

[Appledrop]

hrrm.. just suppose that these points on graphs: A=(7,12) and B=(-3,-12) and C=(14,-5)

well.. Show that AC is perpendicular to BC

Please show your working, so i know you arent cheating...

Go go go!

 

[Lonyo]

Do your own homework.

 

[her209]

-5-12=-17
14-7=7

-5-(-12)=7
14-(-3)=17

I win

 

[randal]

y=mx+b, find the slopes ... something_about_negative_and_how_they_compare ... they're perpendicular.

her209 got it, good job 🙂

 

[bradruth]

Maths? 😕

 

[Yossarian]

I hate when people write "maths". I even hate myself a little bit for writing it just now.

 

[Random Variable]

AC = (7,-17)
BC = (17,7)

AC dotted with BC = (7*17) + (-17*7) = 0

 

[dethman]

Originally posted by: Lonyo
Do your own homework.

 

[PurdueRy]

Originally posted by: Random Variable
AC = (7,-17)
BC = (17,7)

AC dotted with BC = (7*17) + (-17*7) = 0