# 3.16 Veelhoeke  (Page 2/2)

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VERSKILLE

tussen ruit en vierkant

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17.2 Vorm ander groepe van drie elk. Volg dieselfde instruksies as in 17.1, maar bou nou ’n reghoek. As jy op die hoekpunt druk, sal dit in ’n parallelogram verander.

• Vergelyk nou die reghoek met die parallelogram en voltooi die tabel:

OOREENKOMSTE

tussen reghoek en parallelogram

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VERSKILLE

tussen reghoek en parallelogram

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18. Wat noem ons hierdie meetkundige figure?

a)

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b)

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19. Deel in groepe van vier. Jul opvoeder sal julle sê wie a,b,c en d moet doen.

19.1 Hou ’n bespreking oor die ooreenkomste en verskille tussen:

a) ’n ruit en ’n vlieër

b) ’n trapesium en ’n parallelogram

c) ’n reghoek en ’n trapesium

d) ’n vlieër en ’n trapesium

19.2 Maak ’n plakkaat om bogenoemde te verduidelik en gee terugvoering aan die klas.

20. Het jy geweet?

In Wiskunde sê ons ’n figuur is stewig as hy sy oorspronklike vorm behou, indien druk op een van die hoekpunte toegepas word, bv.

Nie stewig nie

Stewig

20.1 Verdeel nou in pare. Gebruik koeldrankstrooitjies en bou enige stewige konstruksie. Kyk dan of julle die hoogste konstruksie in die klas kan bou!

20.2 LET OP!

’n Driehoek is die enigste veelhoek wat rigied / stewig is. Dit verander nie van vorm as jy op enige punt van die raam druk nie.Waar, dink jy, word driehoeke gereeld deur ingenieurs en bouers gebruik om stabiliteit te verseker?

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21. Tyd vir selfassessering

 Merk die toepaslike kolom. Onseker Seker Ek kan verduidelik wat die volgende is: ’n veelhoek ’n konvekse veelhoek ’n konkawe veelhoek ’n reëlmatige veelhoek ’n onreëlmatige veelhoek Ek ken die formule om die hoeke van ’n reëlmatige veelhoek te bereken Ek kan ooreenkomste tussen die verskillende meetkundige vorms uitwys Ek kan die verskille tussen die verskillende meetkundige vorms uitwys Ek kan ’n stewige konstruksie m.b.v. koeldrankstrooitjies bou

## Assessering

Leeruitkomste 3: Die leerder is in staat om eienskappe van en verwantskappe tussen twee-dimensionele vorms en drie-dimensionele voorwerpe in ‘n verskeidenheid oriëntasies en posisies te beskryf en voor te stel.

Assesseringstandaard 3.1: Dit is duidelik wanneer die leerder meetkundige figure en drie-dimensionele voorwerpe in natuurlike en kulturele vorms en ‘n meetkundige agtergrond herken, visualiseer en benoem, insluitend dié wat vroeër behandel is;

Leeruitkomste 2: Die leerder is in staat om patrone en verwantskappe te herken, te beskryf en voor te stel en probleme op te los deur algebraïese taal en vaardighede te gebruik.

Assesseringstandaard 2.3: Dit is duidelik wanneer die leerder voorstellings maak van en verwantskappe tussen veranderlikes gebruik sodat inset- en/of uitsetwaardes op ‘n verskeidenheid maniere bepaal kan word.

#### Questions & Answers

Do somebody tell me a best nano engineering book for beginners?
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s.
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Harper
how to fabricate graphene ink ?
for screen printed electrodes ?
SUYASH
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of graphene you mean?
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or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
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China
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types of nano material
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many many of nanotubes
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what is the function of carbon nanotubes?
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I'm interested in nanotube
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preparation of nanomaterial
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what is system testing
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Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
can nanotechnology change the direction of the face of the world
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
how did you get the value of 2000N.What calculations are needed to arrive at it
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