Blue 45-45-90 Triangle Ruler - Precision Drafting Tool for Students & Designers #177713 (License: Personal Use)

This precision-engineered triangular ruler features a classic 45-45-90 degree configuration, made from durable translucent blue plastic with crisp white edge highlights for enhanced visibility. The central cutout reduces weight and allows for easy handling and alignment over图纸 or digital screens. Ideal for students, architects, engineers, and hobbyists requiring reliable right-angle and isosceles triangle references.

Used in educational settings (math/geometry classes), architectural drafting, engineering schematics, and DIY projects where accurate 45-degree angles are required; matches user intent for purchasing or learning about drafting tools.