Subjects
Grades
Constructing Perpendicular and Parallel lines
Concept sheet | Mathematics
Secondary
1-2
- Two lines are parallel when they do not have a point in common.
- Two lines are perpendicular when they intersect at right angles.
Parallel and perpendicular lines can be drawn using a set square and a ruler.
Constructing Two Perpendicular Lines
A line that is perpendicular to another can be traced using a set square and a ruler by following these steps:
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Place one side of the set square’s right angle along the first segment with the right angle’s vertex coinciding with one end of the segment.
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Keeping the set square in place, draw a line perpendicular to the first segment following the second side of the right angle.
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If necessary, move the square along the perpendicular to make it longer.
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Constructing Two Parallel Lines
A line parallel to another can be traced using a set square and a ruler by following these steps:
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Place one side of the set square’s right angle along the first segment. Then, place the ruler against the other side of the set square’s right angle.
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Slide the set square along the ruler, keeping it in place to keep the direction of the line.
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Draw a new straight line parallel to the first without moving the set square.
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