Contributed by:

This pdf includes the following topics:-

Undefined Terms

Plane

LINE

Defined Terms

Segment

Ray

Examples

Undefined Terms

Plane

LINE

Defined Terms

Segment

Ray

Examples

1.
Identify Points Lines

and Planes

Essential Question: How

do you name

geometric figures?

We will write and discuss geometric figures.

and Planes

Essential Question: How

do you name

geometric figures?

We will write and discuss geometric figures.

2.
Undefined Terms

β’ Undefined terms are words that do not have

formal definitions, but there is agreement

about what they mean.

β’ The three undefined terms in geometry are

point, line, and plane.

Essential Question: How do you name geometric figures?

Demonstrated in writing on summary at the end of notes.

β’ Undefined terms are words that do not have

formal definitions, but there is agreement

about what they mean.

β’ The three undefined terms in geometry are

point, line, and plane.

Essential Question: How do you name geometric figures?

Demonstrated in writing on summary at the end of notes.

3.
Point

A point has no dimension. It is represented by a

Point A

.A

Essential Question: How do you name geometric figures?

Demonstrated in writing on summary at the end of notes.

A point has no dimension. It is represented by a

Point A

.A

Essential Question: How do you name geometric figures?

Demonstrated in writing on summary at the end of notes.

4.
Line

A line has one dimension. It is represented by a

line with two arrowheads, but extends without

Through any two points there is exactly one line.

You can use any two points on a line to name it.

l .A .B Line l, line AB (π΄π΅),

line BA (π΅π΄),

Essential Question: How do you name geometric figures?

Demonstrated in writing on summary at the end of notes.

A line has one dimension. It is represented by a

line with two arrowheads, but extends without

Through any two points there is exactly one line.

You can use any two points on a line to name it.

l .A .B Line l, line AB (π΄π΅),

line BA (π΅π΄),

Essential Question: How do you name geometric figures?

Demonstrated in writing on summary at the end of notes.

5.
Plane

A plane has two dimensions. It is represented by a

shape that looks like a floor or a wall, but it extends

without end.

Through any three points not on the same line

there is exactly one plane. You can use three points

that are not all on the same line to name a plane.

M

.A Plane M or Plane ABC

.B .C

Essential Question: How do you name geometric figures?

Demonstrated in writing on summary at the end of notes.

A plane has two dimensions. It is represented by a

shape that looks like a floor or a wall, but it extends

without end.

Through any three points not on the same line

there is exactly one plane. You can use three points

that are not all on the same line to name a plane.

M

.A Plane M or Plane ABC

.B .C

Essential Question: How do you name geometric figures?

Demonstrated in writing on summary at the end of notes.

6.
Essential Question: How do you name geometric figures?

Demonstrated in writing on summary at the end of notes.

Demonstrated in writing on summary at the end of notes.

7.
Defined Terms

β’ Terms that can be described using known

words such as point or line.

Essential Question: How do you name geometric figures?

Demonstrated in writing on summary at the end of notes.

β’ Terms that can be described using known

words such as point or line.

Essential Question: How do you name geometric figures?

Demonstrated in writing on summary at the end of notes.

8.
Segment

The line segment AB, or segment AB, (written

π΄π΅) consists of the endpoints A and B and all

points on π΄π΅ between A and B.

.B

Endpoint

Essential Question: How do you name geometric figures?

Demonstrated in writing on summary at the end of notes.

The line segment AB, or segment AB, (written

π΄π΅) consists of the endpoints A and B and all

points on π΄π΅ between A and B.

.B

Endpoint

Essential Question: How do you name geometric figures?

Demonstrated in writing on summary at the end of notes.

9.
Ray

The ray AB (written π΄π΅) consists of the endpoint

A and all points on π΄π΅ that lie on the same side

of A as B.

Note that π΄π΅

.A .B and π΅π΄ are

different rays.

Essential Question: How do you name geometric figures?

Demonstrated in writing on summary at the end of notes.

The ray AB (written π΄π΅) consists of the endpoint

A and all points on π΄π΅ that lie on the same side

of A as B.

Note that π΄π΅

.A .B and π΅π΄ are

different rays.

Essential Question: How do you name geometric figures?

Demonstrated in writing on summary at the end of notes.

10.
Opposite Rays

β’ If point C lies on π΄π΅ between A and B, then

πΆπ΄ and πΆπ΅ are opposite rays.

.A .C .B

Essential Question: How do you name geometric figures?

Demonstrated in writing on summary at the end of notes.

β’ If point C lies on π΄π΅ between A and B, then

πΆπ΄ and πΆπ΅ are opposite rays.

.A .C .B

Essential Question: How do you name geometric figures?

Demonstrated in writing on summary at the end of notes.

11.
β’ Collinear points are points that are on the

same line.

β’ Coplanar points are points that lie in the same

plane.

Essential Question: How do you name geometric figures?

Demonstrated in writing on summary at the end of notes.

same line.

β’ Coplanar points are points that lie in the same

plane.

Essential Question: How do you name geometric figures?

Demonstrated in writing on summary at the end of notes.

12.
Essential Question: How do you name geometric figures?

Demonstrated in writing on summary at the end of notes.

Demonstrated in writing on summary at the end of notes.

13.
β’ Two different lines intersect in one point.

β’ Two different planes intersect in one line.

Essential Question: How do you name geometric figures?

Demonstrated in writing on summary at the end of notes.

β’ Two different planes intersect in one line.

Essential Question: How do you name geometric figures?

Demonstrated in writing on summary at the end of notes.

14.
Example: Sketch two planes that

intersect in a line.

Essential Question: How do you name geometric figures?

Demonstrated in writing on summary at the end of notes.

intersect in a line.

Essential Question: How do you name geometric figures?

Demonstrated in writing on summary at the end of notes.