Yes, the tri-recs rulers always come in a set of two. You cut one large triangle for the center of the triangle-in-a-square and cut two of the smaller triangles for the outsides. Remember to always cut a left and right pair of small triangles. Also, if you want to make diamonds, cut your fabric into strips, then fold them in half lengthwise; place the bottom of the large triangle on the fold, and cut. You will then need four of the outside triangles to complete your rectangle-shaped diamond block. The diamonds in the outside border were made this way with the tri-recs rulers.
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