Question

1. what transformation is used to create this frieze pattern?

vertical reflection
glide reflection
180° rotation
horizontal reflection

Explanation:

A horizontal reflection flips a figure over a horizontal line. In the given frieze pattern, the top - row elements (like "AR") are mirrored over a horizontal line to get the bottom - row elements (like "ЯЯ" which is a mirrored form). A vertical reflection would flip over a vertical line (not the case here). A glide reflection is a combination of a translation and a reflection (but there's no translation component in the basic transformation from top to bottom row here). A \(180^{\circ}\) rotation would turn the figure \(180^{\circ}\) (which is different from the simple top - bottom mirroring).

Answer:

horizontal reflection