C6. Geometry (lines)

C6. Geometry (lines)

by Jean Caballes

​Point

​- A point has no size; it shows the position of something.

​- Points are named by capital letters.

Multiple Choice

What is the name of this point?

• point A

• point a

• point letter

• point D

​Line

​- A line has no beginning and has no end.

- It contains the points A and B, so it is named "line AB"; written: AB

Ray

​- A line with one end point.

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​- It contains the point A and B, so it is named "ray AB"; written: .

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​- The end point is always named first.

Line Segment

​- A line segment has two end points.

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​- It contains the point A and B, so it is named "line segment AB"; written: .

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​- It is the shortest distance between two points.

Multiple Choice

What is a line that has two end points?

• ray

• line segment

• line

Multiple Choice

What is a line that has one end point?

• ray

• line segment

• line

Multiple Choice

What is a line that has no beginning and no end?

• ray

• line segment

• line

Multiple Choice

What is this picture?

• ray

• line segment

• line

Multiple Choice

What is this picture?

• ray

• line segment

• line

Multiple Choice

What is this picture?

• ray

• line segment

• line

Parallel Lines

​- These are the lines that never meet.

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​- To show that lines are parallel, we draw arrow heads.

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​- It is written, PQ RS.

Angles

​- Lines which are not parallel, they meet and cross.

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​- At that point they make angles.

Multiple Choice

What is this picture?

• line segment

• ray

• parallel lines

• angle

Multiple Choice

What is this picture?

• line segment

• ray

• parallel lines

• angle

Multiple Choice

What are two lines that do NOT meet and touch with each other?

• line segment

• ray

• parallel lines

• angle

Multiple Choice

What lines meet and touch with each other?

• line segment

• ray

• parallel lines

• angle