4.6A

Angles, Perpendicular and Parallel Lines

Math 4.6A

Parallel Lines

Straight lines that never meet.

Perpendicular lines

Lines that intersect and create right angles at the point of intersection.

Perpendicular Lines

Two lines that meet or intersect each other at right angles (90°).

Acute angles

Measure less than 90 degrees

Obtuse Angles

Measure more than 90 degrees

Right Angles

Measure exactly 90 degrees

Multiple Choice

A drawing is shown.

• Two line segments that appear to be parallel

• Two line segments that appear to be perpendicular

• Two lines that appear to be parallel.

• Two lines that appear to intersect.

Multiple Choice

What angle is shown in the picture?

• acute angle

• right angle

• straight angle

• obtuse angle

Multiple Choice

What angle is show in the picture?

• right angle

• acute angle

• obtuse angle

• straight angle

Multiple Choice

What angle is shown in the picture?

• acute angle

• obtuse angle

• right angle

• straight angle

Multiple Choice

How many lines of symmetry does this triangle have?

• 1

• 2

• 3

• 4

Multiple Choice

What is this figure called?

• line

• line segment

• ray

• angle

Multiple Choice

What is this figure called?

• line

• line segment

• angle

• ray

Multiple Choice

What is this figure called?

• line

• line segment

• angle

• ray

Categorize

Options (4)

Drag the picture under the correct word.

Parallel lines

Perpendicular lines

Intersecting Lines

Line segment

Multiple Choice

These are perpendicular lines

• False

• True

​Let's Review

​Let's refresh our minds and review previous concepts from the unit.

Dropdown

I know these are perpendicular lines because. They form a ___ where they cross.

Select answer

Multiple Choice

Are these perpendicular lines?

• No

• Yes

Multiple Choice

What do we call lines that intersect and form 90 degree angles?

• Parallel

• Perpendicular

• Intersecting

Multiple Choice

Are these lines parallel?

• Yes

• No

Multiple Choice

These lines are parallel because they will never touch

• true

• false

Multiple Choice

Which names a straight angle in the figure above?

• Angle ABC

• Angle EBF

• Angle CBF

• Angle ABF

Multiple Choice

Name the figure.

• ray
• line
• line segment
• point

Multiple Choice

What is this?

• Line segment
• Ray
• Point
• Line Segment

Multiple Choice

What type of line does the picture represent? 

• Parallel
• Intersecting
• Perpendicular

Multiple Choice

What type of line does the picture represent?

• Parallel
• Intersecting
• Perpendicular

Multiple Choice

What type of line does the picture represent?

• Parallel
• Intersecting
• Perpendicular

Multiple Choice

What is the definition of perpendicular lines?

• Lines that never intersect.

• Lines that intersect to form right angles.

• Lines that intersect at any angle.

• Lines that are straight.

Multiple Choice

Jessi and Jenny live on a street that intersects with Calle Encina. In which street do they live?

• Calle Pino

• Calle Roble

• Calle Palmera

Multiple Choice

What is a name for this line?

Multiple Choice

Choose the most precise answer: These streets are

• Parallel
• Perpendicular
• Intersecting

Multiple Choice

Choose the most precise answer: These roads are

• Parallel
• Perpendicular
• Intersecting

Multiple Choice

What type of angle is shown?

• acute
• obtuse
• right 
• straight

Multiple Choice

What type of angle is shown?

• acute
• obtuse
• right
• straight

Multiple Choice

What type of angle is shown?

• acute
• obtuse
• right
• straight

Multiple Choice

What type of angle is shown?

• acute
• obtuse
• right
• straight

Multiple Choice

What kind of lines are these?

• Parallel lines

• Line segments

• Perpendicular Lines

• Intersecting lines

Multiple Choice

.

.

What kind of intersecting lines are these?

• Parallel Lines

• Perpendicular Lines

• adjacent

• opposite

Multiple Choice

Which figure shows a set of perpendicular lines?

• Figure 1
• Figure 2
• Figure 3
• Figure 4

Multiple Choice

The yellow yard lines are an example of what type of line?

• perpendicular lines
• parallel lines
• intersecting lines
• number lines

Multiple Choice

Name this angle.

• acute
• right
• obtuse
• none of the above

Multiple Choice

Name this angle.

• acute
• right
• obtuse
• none of the above

Match

Match the following

Ray

Line

Line segment

Point

Angle

• Ray

• Line

• Line segment

• Point

• Angle

Match

Match the following

Right Angle

Straight Angle

Acute Angle

Obtuse Angle

• Right Angle

• Straight Angle

• Acute Angle

• Obtuse Angle

Multiple Select

Select all the acute angles.

Multiple Choice

Right, acute, or obtuse?

• Right
• Acute
• Obtuse

Multiple Choice

What kind of triangle is this?

• Acute
• Right
• Sparkly
• Obtuse

Multiple Choice

What type of lines never intersect?

• Parallel lines

• Perpendicular lines

• Intersecting lines

• Diagonal lines

Multiple Choice

Which of the following is not a way to describe the direction of a line?

• Horizontal

• Circular

• Vertical

• Diagonal

Multiple Choice

What type of lines never intersect?

• Parallel lines

• Perpendicular lines

• Intersecting lines

• Diagonal lines

Multiple Choice

Which of the following is not a way to describe the direction of a line?

• Horizontal

• Circular

• Vertical

• Diagonal

Multiple Choice

What type of lines never intersect?

• Parallel lines

• Perpendicular lines

• Intersecting lines

• Diagonal lines

Multiple Choice

Which of the following is not a way to describe the direction of a line?

• Horizontal

• Circular

• Vertical

• Diagonal

Multiple Choice

Which angle measures exactly 90 degrees?

• Straight angle

• Right angle

• Acute angle

• Obtuse angle

Multiple Choice

What type of angle measures more than 90 but less than 180 degrees?

• Obtuse angle

• Straight angle

• Right angle

• Acute angle

Multiple Choice

Which angle measures exactly 90 degrees?

• Straight angle

• Right angle

• Acute angle

• Obtuse angle

Multiple Choice

What type of angle measures more than 90 but less than 180 degrees?

• Obtuse angle

• Straight angle

• Right angle

• Acute angle

Multiple Choice

Which angle measures exactly 90 degrees?

• Straight angle

• Right angle

• Acute angle

• Obtuse angle

Multiple Choice

What type of angle measures more than 90 but less than 180 degrees?

• Obtuse angle

• Straight angle

• Right angle

• Acute angle

Multiple Choice

How is a line segment different from a line?

• It is always horizontal

• It has one arrow

• It has arrows on both ends

• It has no arrows

Multiple Choice

Which of the following correctly describes how to name a line using points?

• Using any two points on the line

• Using the midpoint

• Using the endpoint only

• Using the closest point

Multiple Choice

What is the correct way to denote a ray from point A to point C?

• AC with a line above

• AC with a ray above

• CA with a ray above

• AC with no symbol above

Multiple Choice

How is a line segment different from a line?

• It is always horizontal

• It has one arrow

• It has arrows on both ends

• It has no arrows

Multiple Choice

Which of the following correctly describes how to name a line using points?

• Using any two points on the line

• Using the midpoint

• Using the endpoint only

• Using the closest point

Multiple Choice

What is the correct way to denote a ray from point A to point C?

• AC with a line above

• AC with a ray above

• CA with a ray above

• AC with no symbol above

Multiple Choice

How is a line segment different from a line?

• It is always horizontal

• It has one arrow

• It has arrows on both ends

• It has no arrows

Multiple Choice

Which of the following correctly describes how to name a line using points?

• Using any two points on the line

• Using the midpoint

• Using the endpoint only

• Using the closest point

Multiple Choice

What is the correct way to denote a ray from point A to point C?

• AC with a line above

• AC with a ray above

• CA with a ray above

• AC with no symbol above

Multiple Choice

What symbol represents parallel lines?

• A single line

• A pair of intersecting lines

• Two parallel lines

• A curved line

Multiple Choice

What is the correct symbol for a line segment?

• A line with two arrows

• A line with no arrows

• A curved line

• A line with one arrow

Multiple Choice

What symbol represents parallel lines?

• A single line

• A pair of intersecting lines

• Two parallel lines

• A curved line

Multiple Choice

What is the correct symbol for a line segment?

• A line with two arrows

• A line with no arrows

• A curved line

• A line with one arrow

Multiple Choice

What symbol represents parallel lines?

• A single line

• A pair of intersecting lines

• Two parallel lines

• A curved line

Multiple Choice

What is the correct symbol for a line segment?

• A line with two arrows

• A line with no arrows

• A curved line

• A line with one arrow

Multiple Choice

Which angle is named by its vertex only when it is unambiguous?

• Angle A

• Angle B

• Angle C

• Angle D

Multiple Choice

Which angle is named by its vertex only when it is unambiguous?

• Angle A

• Angle B

• Angle C

• Angle D

Multiple Choice

Which angle is named by its vertex only when it is unambiguous?

• Angle A

• Angle B

• Angle C

• Angle D