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

There are three points $\displaystyle A , B , C $ , they are not collinear .

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

I am curious about this problem .

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

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Originally Posted by simplependulum

There are three points $\displaystyle A , B , C $ , they are not collinear .

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

I am curious about this problem .

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

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Are you using a ruler with measurements or just a straight edge?

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Originally Posted by Prove It

Are you using a ruler with measurements or just a straight edge?

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Just a straight edge for us to draw straight lines .

Yes by using the angle at the top or bottom of your ruler.