Given the points A(0, 0), B(e, f), C(0, e) and D(f, 0), determine if line segments AB and CD are parallel, perpendicular or neither.

a.parallel
b.perpendicular
c.neither

Question

Given the points A(0, 0), B(e, f), C(0, e) and D(f, 0), determine if line segments AB and CD are parallel, perpendicular or neither. 

a.parallel 
b.perpendicular 
c.neither

anonymous · Answer

depends if C is (e,0) or (0,e)

luigi0210 · Answer

Use the slope formula

luigi0210 · Answer

$$AB=\frac{ f-0 }{ e-0 }=\frac{ f }{ e }$$
$$CD=\frac{ 0-e }{ f-0 }=\frac{ -e }{ f }$$

luigi0210 · Answer

So what is your conclusion Miss Magan?

anonymous · Answer

you can see that the product of AB and CD is -1 thus both are perpendicular to each other

anonymous · Answer

although luigi is 100% correct, important to make sure that C is (e, 0), or (0, e). this would give a different (and it's what you wrote)

luigi0210 · Answer

well they gave you the answer .-.

anonymous · Answer

oh sorry i was away from the computer, and gota go but thanks for your help.

luigi0210 · Answer

You are welcome, have a nice night Magan :P