Geom_Week 5_Lesson 4 - Constructions of Lines

Unit 3 - Constructions of Parallel and

Perpendicular Lines

After doing this lesson, you should be able to:

●Use a compass and straightedge to construct 2 parallel lines;

●Use a compass and straightedge to construct a perpendicular
bisector;

●Use a compass and straightedge to construct 2 perpendicular
lines through a given point.

●Apply the steps learned above to complete same constructions
using digital tools.

Remember to go as slowly and repeat as many times as you need until you understand the lesson.

Vocabulary

Transversal: a line that intersects 2 (or more) other lines

Parallel lines: 2 or more coplanar lines with the same slope (meaning they

never intersect),

Perpendicular lines: 2 coplanar lines with the slopes that are opposite

reciprocals of each other (meaning they intersect at a right
angle)

Right Angle: an angle formed by 2 lines that cross to create a 90° angle

Perpendicular Bisector: a line that intersects a segment at the midpoint at a

right angle.

Watch Video - Take Notes

Remember:

PAUSE the video to write down notes

Adjust the SPEED of the video to best fit your learning style

REWIND and watch parts of the video over again, until you have
understanding of the content

Lesson 5
Constructions of Parallel and Perpendicular Lines



Note Sheet


Get your notes ready...the video is next.

Reorder

Place the following steps in order.

"Construction of Parallel Lines"

1

2

3

4

• 1
• 2
• 3
• 4

Drag and Drop

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Placeholder

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Placeholder

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Drag these tiles and drop them in the correct blank above

Draw arc at A

Draw same size arc at B

Draw line connecting 2 points of intersection

Draw large arc at A that crosses the line twice

Draw ray thru A

Categorize

Options (6)

Draw one large arc from given point.

Draw 2 congruent arcs that intersect.

Draw perpendicular line.

Organize these options into the right categories

Step 1:

Step 2:

Step 3:

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