The Deli Foldable Ruler is a smart and compact measuring tool designed for convenience and clarity. Measuring 30 cm when fully extended, it folds down to 15 cm, making it easy to carry and store. The ruler features double-sided clear markings for accurate readings and includes printed trigonometric formulas, such as sum and difference identities for sine and cosine, and reciprocal identities like sinα⋅cscα=1\sin \alpha \cdot \csc \alpha = 1. Made from high-quality plastic, it offers durability and flexibility for everyday use. Perfect for students, teachers, and professionals, this ruler combines functionality with educational value.
TECHNICAL DETAILS:
| Attribute | Details |
| Brand | Deli |
| Model Number | REG101 |
| Product Type | Foldable Ruler |
| Length | 30 cm (folds to 15 cm) |
| Material | Plastic |
| Design | Double-sided, printed formulas |
| Features | Trigonometric identities, compact |
| Recommended Use | School, office, general measuring |
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