Japanese
Orthogonal (Perpendicular)
- "Orthogonal (Perpendicular)"
- Two straight lines are perpendicular to each other (are orthogonal) if they form four right angles at their point of intersection.
Equivalently, two straight lines are orthogonal if a right angle occurs at their point of intersection.
- How to draw "orthogonal (perpendicular)"
Reason of way of drawing
- Drawing "orthogonal (perpendicular)" is one of basic techniques that should be instructed in the primary mathematics.
- Tools
Compasses, Set Square, Protractor
- Drawing a perpendicular to a straight line from a given point (not) on it
- Put one of the sides of the right angle of the set-square along the straight line.
- Slide the set-square until the other side of the right angle passes through the point.
- Draw a straight line along this side.
- The straight line is the required perpendicular.