Constructing Parallel and Perpendicular Lines

The video tutorial teaches how to construct parallel and perpendicular lines using a ruler and set square. It covers the steps to create parallel lines at specific distances and perpendicular lines both on and outside a given line. The tutorial provides examples and encourages students to practice these constructions on their own.

What tools are introduced for constructing parallel and perpendicular lines?

• Protractor and scale

• Divider and scale

• Ruler and set square

• Compass and protractor

What is the first step in constructing parallel lines AB and PQ?

• Draw line PQ

• Draw line AB

• Slide the set square

• Mark points A and P 8 cm apart

What is the final step in constructing parallel lines AB and PQ?

• Remove the ruler

• Draw lines AB and PQ using a ruler

• Mark points B and Q

• Slide the set square

How far apart are the parallel lines EF and GH constructed in the example?

• 8 cm

• 6.8 cm

• 5 cm

• 7.5 cm

In the example of constructing parallel lines EF and GH, what is the significance of the distance 6.8 cm?

• It is the distance from point E to point F

• It is the length of line GH

• It is the distance between EF and GH

• It is the length of line EF

What is the first step in constructing a perpendicular line LM to line AB?

• Draw line AB and mark point L on it

• Mark point M on line AB

• Remove the set square

• Slide the set square to point L

What is the purpose of sliding the set square along the ruler when constructing perpendicular lines?

• To mark the midpoint of the line

• To draw a parallel line

• To align the vertical edge with a specific point

• To measure the length of the line

Where is point X located when constructing a perpendicular line XY to line PQ?

• Outside line PQ

• On line PQ

• At the end of line PQ

• At the midpoint of line PQ

What is the second step in constructing a perpendicular line XY to line PQ from point X?

• Remove the set square

• Slide the set square to point X

• Draw line XY

• Mark point Y on line PQ

What is the result of constructing line XY perpendicular to line PQ?

• Line XY is a tangent to line PQ

• Line XY is parallel to line PQ

• Line XY is perpendicular to line PQ

• Line XY is identical to line PQ