Geometry Lines

Lines, Points, Line Segments, Rays

Objective: Identify and draw points, lines, line segments, rays, and angles. Recognize them in various contexts and familiar figures.

What is a line?

A straight path that goes on forever with no endpoints.

What is a line segment?

A part of a line that has an endpoint on both ends.

Open Ended

What do you notice about the picture on the previous slide?

What is a Ray?

A ray is a part of a line that goes on forever in only one direction.

Open Ended

What do you notice about the picture on the previous slide?

What is a point?

A point is an exact position on a plane.

Open Ended

What do you notice about the picture on the previous slide?

What are angles?

In geometry, an angle can be defined as the figure formed by two rays meeting at a common end point.

An angle is represented by the symbol ∠

Multiple Select

What is a name for this LINE SEGMENT? THERE ARE TWO CORRECT ANSWERS

Multiple Choice

What is the name of this ray?

• Ray BA

• Ray AB

• Ray A

• Ray B

Multiple Choice

A _____ is straight and extends in both directions forever.

• point

• line

• line segment

• ray

Multiple Choice

What does the image show?

(The whole thing, not just the points)

• a ray

• a line

• a point

• a line segment

Multiple Choice

What does the image show?

• a line

• a line segment

• a ray

• an angle

• The pairs of lines (a), (c) and (d) right are called parallel lines

• The intersecting lines as shown in Figure 3.

• These pairs of lines meet at a certain point called the point of intersection.

• Perpendicular lines as shown in Figure 4. These are pairs of lines that intersect to form right angles.

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• The square drawn at the point of intersection of perpendicular lines represents a right angle

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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

Which figure shows a set of parallel lines?

• Figure 1

• Figure 2

• Figure 3

• Figure 4

Multiple Choice

The black lines on this Railroad Crossing sign are an example of what type of lines?

• parallel lines

• perpendicular lines

• intersecting lines

• interurban lines

Multiple Choice

• Parallel

• Perpendicular

• Intersecting

Multiple Choice

• Parallel

• Perpendicular

• Intersecting

Multiple Choice

• Parallel

• Perpendicular

• Intersecting

Multiple Choice

• Parallel

• Perpendicular

• Intersecting