Constructing Parallel and Perpendicular Lines

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

What is the first step in constructing parallel lines AB and PQ using a ruler and set square?

• Draw a line connecting points A and B.

• Mark two points A and P, 8 centimeters apart.

• Slide the set square along the ruler.

• Draw lines AB and PQ using a ruler.

What tool is used alongside a ruler to construct parallel and perpendicular lines?

• Set square

• Protractor

• Divider

• Compass

What is the final step in constructing parallel lines using a ruler and set square?

• Plot points along the vertical edge of the set square.

• Remove the set square and draw lines using a ruler.

• Slide the set square along the ruler.

• Mark two points 8 centimeters apart.

What is the purpose of sliding the set square along the ruler in these constructions?

• To draw a diagonal line.

• To mark the midpoint of the line.

• To ensure the lines are parallel or perpendicular.

• To measure the length of the line.

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

• 5 centimeters

• 7.5 centimeters

• 6.8 centimeters

• 8 centimeters

When constructing a perpendicular line LM to line AB at point L, what is the second step?

• Draw line AB with a ruler.

• Mark point M along the vertical edge of the set square.

• Slide the set square along the ruler until its vertical edge reaches point L.

• Remove the set square.

In constructing perpendicular lines, what is the significance of the vertical edge of the set square?

• It helps in measuring distances.

• It ensures the line is straight.

• It is used to draw circles.

• It is used to align with the point through which the perpendicular passes.

In the example of constructing line QR perpendicular to line MN, where is point Q located?

• At the end of line MN

• At the midpoint of line MN

• On line MN

• Outside line MN

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

• Mark point Y on line PQ.

• Remove the set square.

• Draw line PQ using a ruler.

• Slide the set square along the ruler.

When constructing a perpendicular line from a point outside the line, what is the second step?

• Remove the set square.

• Slide the set square along the ruler until the vertical edge reaches the outside point.

• Mark a point on the line.

• Draw the line using a ruler.