This multi-sized ruler features the two triangles required to complete a flying geese unit - 45 and 90 degree - in one tool. Cut flying geese units up to a finished size of 6 inches x 12 inches or use the triangles individually to cut half-square triangles up to a finished size of 6 inches and cut quarter-square triangles up to a finished size of 12 inches. The math required to cut these angles is incorporated into the easy to read black and white markings.
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