Lesson 1.1 , 1.2, 1.3

Lesson 1.1 , 1.2, 1.3

• Conclusions based on patterns

• Inductive reasoning

• Basic terms of Geometry

• Postulates of Geometry

Use the pattern to find the next two terms.

a.

b.

c.

•Points, Lines, and Planes

Section 1.2

or?

How to label: any three points on the plane

How many planes do you see?

How to label: any three (or more) points on the plane

How many planes do you see?

plane AEHDplane EHDplane HDAplane DAEplane AEHetc.

How to label: any three (or more) points on the plane

How many planes do you see?

plane BFGCplane BFGplane FGCplane GCBplane CBFetc.

How to label: any three (or more) points on the plane

How many planes do you see?

plane DCGHplane DCGplane CGHplane GHDplane HDCetc.

Coplanar objects (points or lines) are objects that lie on the same plane.

(The plane does not have to be visible.)

Definition:

Are they coplanar?ABC ? yesABCF ? NOHGFE ? yesEHCB ? yesAGF ? yesCBFH ? NO

Section 1.3

Segments, Rays, Parallel Lines & Planes

A

K

T

M

B

C

D

E

HG

F

N

A

K

T

M

B

C

D

E

HG

F

N

Note the notation ofParallel “||”

Plot the following points

And determine if they produce parallel Lines.

Line a: (1,2) & (3,4)Line b: (-3,1) & (1,3)

Line a: (0,0) & (2,2)Line b: (0,-3) & (2,-1)

Classwork / Homework

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