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