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