Matching Pairs Design Elements #1Online version Test your knowledge of the basic elements of hair design. by Rosalind Carter 1 vertical lines 2 Contrasting lines 3 diagonal lines 4 single lines 5 directional lines 6 Horizontal lines 7 curved lines 8 parallel lines 9 Transitional lines Move in a circular or semi-circular direction. Lines with a definite forward or backward movement. Used in the one-length hairstyle. Create length and height in hair design. curved lines that are used to blend and soften horizontal or vertical lines. horizontal and vertical lines that meet at a 90-degree angle. create width in a hairstyle. Repeating lines in a hairstyle. Often used to emphasize or minimize facial features.