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MATHEMATICS FORM 5

http://localhost/var/www/apps/conversion/Informasi%201.ppt

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NORTH POLE

SOUTH POLE

EASTWEST

LONGITUDELATITUDE

MALAYSIA

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Great circle is any circle

that passes through the

north and the south

poles or with the center

as the centre of the

earth.

GREAT CIRCLE

O

N

S

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One-half of a greatcirclejoining the North

and the South Poles is

called a meridian.

S

N

OO

Longitude of a meridian is

determined by the angle

between its plane and the

plane for Greenwich Meridian

(east or west).

Greenwich Meridi

an 0 o

LONGITUDE

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Example :

G is stated on the Greenwich

Meridian .

L is 80o to the right of G.

So the longitude of L is 80oE.

K is 60oto the left of G.

So the longitude of K is 60o

W.

K and M is a diameter of a

circle centred C.

KCM = 180o.

So Longitude M is 120oE

N

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EXERCISE 1: State the longitude of (a) dan (b)

(a) 100oE/ 100oW

(b) 80oE/ 180oW

(a)

(b)

N

E

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Where is our country, Malaysia stated ?

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The Great Circle

which the plane

are perpendicular

to the poles is

known as the

equator

Marked as 0o

North direction

N

S

0

o

South direction

The circle

with plane

which are

parallel to the

equator plane

is known as

parallel of

latitude

LATITUDE

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Latitude

Get further information aboutlatitude and longitude at the

following address:

http://www-

spof.gsfc.nasa.gov/stargaze/Slatlong.htm

http://www-spof.gsfc.nasa.gov/stargaze/Slatlong.htmhttp://www-spof.gsfc.nasa.gov/stargaze/Slatlong.htmhttp://www-spof.gsfc.nasa.gov/stargaze/Slatlong.htmhttp://www-spof.gsfc.nasa.gov/stargaze/Slatlong.htmhttp://www-spof.gsfc.nasa.gov/stargaze/Slatlong.htm

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Latitude Of a Point

Latitude is an angle at the centre of the earththat

subtended by a meridian beginning from the equator

to the parallel of latitude which is either to the North

or to the South of the equator.

Latitude A is 50

o

N

Latitude B is 10

o

S

NORTH

SOUTH

EQUATOR

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N NN

N

S

S

S S

Look at the angle made by equator

plane and parallel latitude 60

o

N

The angle between the

equator plane and the north

plane is 90

o

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Example :

Based on the diagram, O is

the centre of the earth

State the latitude of point

a) W b) X c) Y

Solution:

a) W is 72

o

to the north equator.

So the latitude for W is 72

o

N.

b) X is 65

o

to the south equator

So the latitude for X is 65

o

S.

c) Y is located at the same parallel latitude with W.

Thus, latitude for Y is 72

o

U.

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Exercise 2 : State the latitude of the following

point :

1. Latitude Q is

3. Latitude L is

Q

N

2. Latitude P is

68

o

N 55

o

N 68oN 68 oS5o S 55o N

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Location Of A Place

Location of a place at the surface of the earth can

be determine by its latitude and longitude

For example, based on the above figure Paris is located

at point P

Location of Paris is written as 48

o

50 N,20

o

20 E

What is the location of Q ?

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LONGITUDE = 100O E

LATITUDE = 5ON

MALAYSIA ( 5O

N, 100O

E )

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E1 E 2

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E1 E2