DiLe 30cm Angle Parallel Drawing Ruler for Registered Architects, Design Students, Stationery, Postgraduate Entrance Exam, Line-Drawing Ruler, Exam Grid Ruler, Balance Ruler, Multifunctional Rolling Sliding Ruler 2671

Basic Functions

• Parallel ruler functionality
• Conversion formulas for common measurements
• Protractor for angle measurements
• 30cm sliding roller for precise markings

Usage

• Drawing horizontal parallel lines by sliding the ruler along the edge
• Drawing vertical parallel lines by inserting a pen into the small hole and sliding up and down
• Drawing arcs and curves by using the holes on the ruler as centers
• Measuring angles by aligning the protractor center with the vertex of the angle

Additional Information

• Circumference formula: Circumference = πD
• Arc length formula: Length of arc = yθ
• Spherical volume formula: Spherical volume = πr
• Spherical area formula: Spherical area = 4πr
• Circular area formula: Circular area = πr

Size Display

Multi-functional Roller

• Gear design for smooth rolling
• Precision measurements for various angles and formulas

Application

• Ideal for drawing various shapes and developing creative thinking

Package Includes

• 1 x DiLe Ralling Line Ruler