# Is it possible to draw a parallel line only using a ruler

• February 9th 2010, 01:23 AM
simplependulum
Is it possible to draw a parallel line only using a ruler
There are three points $A , B , C$ , they are not collinear .

Can we draw a straight line which passes through $A$ and is parallel to line $BC$ using a rule without a scale ?

Is it possible ? .. I don't think it is . There is a big limitation ! (Thinking)
• February 9th 2010, 02:11 AM
Prove It
Quote:

Originally Posted by simplependulum
There are three points $A , B , C$ , they are not collinear .

Can we draw a straight line which passes through $A$ and is parallel to line $BC$ using a rule without a scale ?

Is it possible ? .. I don't think it is . There is a big limitation ! (Thinking)

Are you using a ruler with measurements or just a straight edge?
• February 9th 2010, 05:57 AM
simplependulum
Quote:

Originally Posted by Prove It
Are you using a ruler with measurements or just a straight edge?

Just a straight edge for us to draw straight lines .
• February 9th 2010, 07:45 AM
Bwts
Yes by using the angle at the top or bottom of your ruler.