Dorene Speckman (RIP) used to call the shapes created with the tri-recs tools "peaky" and "spike". I can't remember which she called which. Anyway, she wrote a book called Pattern Play, which was loaded with ideas and quilts using the blocks. The book is CHEAP on the Amazon.com used market. Pick up a copy if you don't have one.
Nancy Martin's "The Joy of Quilting" has several quilts made with the blocks. Also cheap on the Amazon used market.