If you look carefully at the 2 pictures of blocks that you have posted, you will see that the strips in the bottom left triangle are thinner than the ones in the top right. Basically, the strip sets for the 2 triangles are not the same size.
I agree with Conchalea. The finished length of the diagonal of your 2" strip set will be 6.3" and the height will be about 3.18". You need to make a strip set that when finished, will match the height of the first triangle, 3.18". So the strips are going to need to be cut a 'strong' 1.5", or cut them 1.5", but use a slightly smaller seam allowance. Be sure to shorten your stitch length if you go this route.
I would sure double check this by using some scrap fabric to cut the second strip set & make a test triangle. Unfortunately, this pattern doesn't lend itself to nice neat measurements.