Question

Please help? Prove that a line parallel to one side of a triangle divides the other two sides proportionally.

Answer 1

I tried making a figure but it didn't work out. I don't know what to do.

Answer 2

Is there some theorem that makes this makes sense? I think the question wants a whole proof.

Answer 3

the two triangles will be similar by AAA, and therefor, their sides are proportional

Answer 4

How did you get that?

Answer 5

can not show here because can't draw it here

Answer 6

oh ok

Answer 7

Can you explain it further or anything?

Answer 8

It would be according to my drawing, but without it, it would not make any sense

Answer 9

ok

Answer 10

Anyone else?

Answer 11

@undeadknight26 ? @phi ?

Answer 12

Prove that a line parallel to one side of a triangle divides the other two sides proportionally.