Constructing Parallel and Perpendicular Lines

The video tutorial teaches how to construct parallel and perpendicular lines using a ruler and set square. It begins with an introduction to the concepts, followed by detailed steps for constructing parallel lines, both 8 cm and 6.8 cm apart. The tutorial then explains how to construct perpendicular lines, first when the point is on the line and then when the point is outside the line. Each method is demonstrated with clear, step-by-step instructions. The video concludes by encouraging 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 AB

• Mark points A and P

• Slide the set square

• Draw line PQ

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

• 8 cm

• 6.8 cm

• 5 cm

• 7.5 cm

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

• Draw line AB

• Remove the set square

• Mark point M

• Slide the set square

In the example, where is point L located when constructing line LM?

• On line AB

• Outside line AB

• Above line AB

• Below line AB

What is the first step in constructing a perpendicular line XY to line PQ from a point outside it?

• Mark point Y

• Draw line PQ

• Remove the set square

• Slide the set square

Where is point X located when constructing line XY?

• On line PQ

• Outside line PQ

• Above line PQ

• Below line PQ

What is the final step in constructing a perpendicular line?

• Draw the perpendicular line

• Mark the perpendicular point

• Remove the set square

• Slide the set square

What is the purpose of sliding the set square along the ruler?

• To draw a straight line

• To align the vertical edge

• To measure the distance

• To mark the midpoint

What is the result of following the steps to construct line LT?

• Line LT is tangent to line AB

• Line LT is diagonal to line AB

• Line LT is perpendicular to line AB

• Line LT is parallel to line AB