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# POINTS, LINES AND PLANES - PowerPoint PPT Presentation

POINTS, LINES AND PLANES. Section 1-1. Jim Smith JCHS. What is Geometry?. Geometry is the study of shapes They studied Geometry in Ancient Mesopotamia & Ancient Egypt Geometry is important in the art and construction fields. POINT.

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### POINTS, LINES AND PLANES

Section 1-1

Jim Smith JCHS

• Geometry is the study of shapes

• They studied Geometry in Ancient Mesopotamia & Ancient Egypt

• Geometry is important in the art and construction fields

A POINT is an exact location on a graph, shape or in space.

The ball is a POINT on the line.

A LINE goes in opposite directions and never, ever ends.

Take a pearl necklace and stretch it out.

The pearls are like points on a line.

A PLANE is a flat surface that goes on forever in all directions.

Imagine sitting on an island in the middle of the ocean. No matter which way you look…all you see is water…forever.

S

R

TO NAME A LINE- USE ANY 2 POINTS ON THE LINE

LINE RT or LINE ST or LINE RS

RT

RS

POINTS ON THE SAME LINE ARE CALLED COLLINEARPOINTS

A, B, AND Y ARE COLLINEAR

.

.

Y

.

B

A

TO NAME A PLANE WE USE 3 OR 4 NONCOLLINEAR POINTS

PLANE WAG or XAG or WXA

.

.A

Q

X

.W

.G

PLANES CAN BE NAMED USING

1 LETTER …. PLANE Q

THE INTERSECTION OF 2 LINES IS A POINT

s

S IS THE INTERSECTION

OF THE 2 LINES

LINE XY INTERSECTS PLANE Q AT POINT X

Y

Q

.

X

THE TARGET AT 1 POINT

Lines YB and XZ do not intersect

Z

.

Y

.

B

X

A

D

G

B

C

E

E

G

H

C

F

Y

G.

P

S.

W.

X