# How to get length of a line from two line which is parallel?

• Oct 17th 2012, 05:14 AM
ashwin
How to get length of a line from two line which is parallel?
I have got two line which are parallel to each other of two different length and also length of one line and perpendicular distance between two lines .I want to get the lenght of another line .Can any one give me how to do this ?
• Oct 17th 2012, 09:49 AM
johnsomeone
Re: How to get length of a line from two line which is parallel?
Quote:

Originally Posted by ashwin
I have got two line which are parallel to each other of two different length and also length of one line and perpendicular distance between two lines .I want to get the lenght of another line .Can any one give me how to do this ?

If I understand the setup, you have two line *segments* of different lengths which a parallel and a known distance apart. Also you know the length of one of the segments. From that, you want to find the length of the other line segment.
If that's the problem, then it doesn't have a solution; it has an infinite number of solutions. The setup puts no restriction on the length of the other line segment (other than it being different from the other segment's length) - it could be anything (except for the other segment's length) .
Is there some additional information to this problem that you've left out?
• Oct 17th 2012, 09:54 AM
Soroban
Re: How to get length of a line from two line which is parallel?
Hello, ashwin!

Sorry, your problem makes no sense.

Quote:

I have got two lines which are parallel to each other of two different lengths
and also length of one line and perpendicular distance between two lines.
I want to get the length of another line.
Can anyone give me how to do this?

This is what we seem to have:
Code:

```         :- - known - -:       P *-----+-------* Q               :               :d               :     R *-------+-------------* S       : - - - -  ?  - - - - :```
We have: $PQ \parallel RS.$

We know the length of $PQ.$

We know the distance $d$ between the lines.

You are asking for the length of $RS\,?$
• Oct 17th 2012, 08:07 PM
ashwin
Re: How to get length of a line from two line which is parallel?
yea i have to get the length of RS
• Oct 17th 2012, 08:41 PM
Soroban
Re: How to get length of a line from two line which is parallel?
Hello, ashwin!

Quote:

yea i have to get the length of RS.

You saw my diagram, right?

Has it occured to you yet that RS could be any length?

You have two parallel boards.
One of them is 6 feet long.
The boards are 4 feet apart.
How long is the other board?
• Oct 17th 2012, 08:47 PM
ashwin
Re: How to get length of a line from two line which is parallel?
that is wat i want
is there any way to get that
• Oct 17th 2012, 08:53 PM
MarkFL
Re: How to get length of a line from two line which is parallel?