How do I square strip of stacked coins that are not squared
I'm trying to make this quilt top that is called Stacked Coins but the coin strips are cut from various fabrics that are 9 inches wide but are sewed together in different lengths and angles. When I got done one strip it needs to be squared so that each side is straight and I don't know how to this. The instructions I have for this pattern don't make sense to me.
Is there a simple way to square this 46 inch length strip so both sides are straight from top to bottom.
Thanks for any help.