The correct answer for the question that is being presented above is this one: "90 degrees." Sylvia’s aunt asked her to help cut out fabric for a quilt. The figure shows the pattern of one section that is made of triangles. The degree of rotation clockwise about point B should Sylvia use to prove that ΔABC (pre-image) and ΔIBH (image) use the same amount of fabric is 90 degrees clockwise.