Drawing parallel & perpendicular lines
Japanese school year: Elementary 4
What you learn
Learn how to accurately draw parallel and perpendicular lines using set squares and rulers. Precise drawing forms the foundation for understanding geometric properties of quadrilaterals. Being familiar with the basic concepts of right angles and parallelism will help you succeed.
Key points
This method is used to draw a perpendicular line accurately. Align one edge of a set square's right angle with the base line, then draw along the other edge.
This method is used to draw parallel lines accurately using two set squares. Hold one set square firmly in place and slide the other along its edge to draw lines.
This states the fundamental property of parallel lines. The distance between the two lines is always constant, and they will never intersect no matter how far they extend.
Choose a set to practice.