Origami Folding Diagram: Triangular Flap Fold Instruction #1852094 (License: Personal Use)

This black-and-white line illustration demonstrates a fundamental origami maneuver: folding a triangular flap inward along a pre-creased dashed line, indicated by a curved arrow showing direction. The solid lines represent existing edges and folds, while the dashed line marks the new valley fold. Such diagrams are essential in origami schematics to convey precise, unambiguous folding instructions without text.

Used in origami tutorials, instructional books, or online craft guides to visually communicate folding steps. Matches user intent for learning paper folding techniques, especially for models requiring precise flap manipulation like birds, insects, or modular units.