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Wiskunde

Graad 4

Ruimte en vorm, patrone, datahantering

Module 15

Driedimensionele voorwerpe uit die omgewing

AKTIWITEIT 1:

Om driedimensionele voorwerpe uit die omgewing met betrekking tot geometriese eienskappe te ondersoek en vergelyk en deur driedimensionele modelle met uitgeknipte veelhoeke te maak

[LU 2.2, 3.2, 3.3, 3.5, 4.8]

1. Ondersoek van ruitnette: kartondose.

Jy het die volgende kartondose nodig: graanvlokkiedoos; 'n kartondosie waarin tee verpak was, en nog meer. Maak die dele waar die kartondose geplak is, versigtig los sodat jy die kartondoos plat op die tafel kan neerlê. Bestudeer die plan of ruitnet van die kartondoos.

2. Voordat jy die ruitnet hieronder uitknip, moet jy kolletjies soos vir 'n dobbelsteentjie op die verskillende vlakke invul. Knip dan die net uit, vou dit op die lyne langs om 'n kubus te vorm en plak dit met kleeflint. Kyk na 'n werklike dobbelsteentjie om te sien of jy die getalle kolletjies korrek aangedui het.

3. Knip die vorm onder die tabel hier onder uit en vou dit langs die lyne om 'n piramiede (viervlak of tetraëder) met drie kante en 'n driehoekige basis te vorm.

4. Kyk nou na die ruitnette van die graanvlokkiedoos ('n reghoekige prisma); die kubus wat jy self uitgeknip het en die tetraëder om hierdie tabel te kan voltooi:

Voorwerp Aantal vlakke Plat of geronde vlakke Aantal hoekpunte Aantal kante
Reghoekige prisma
Kubus
Tetraëder

Aktiwiteit 2:

Om simmetriese-lyne in tweedimensionele vorms, insluitend natuurlike en kulturele kunsvorms, te herken en te beskryf [LU 3.4]

1. PROJEK.

  • Versamel soveel verskillende blare as moontlik. Kyk of hulle presies in die helfte gevou kan word sodat die twee helftes identies is. As dit moontlik is, is die lyn waarlangs hulle gevou word, die SIMMETRIE-LYN. Plak jou blare op 'n vel karton, dui die simmetrie-lyn aan en versier die klas daarmee.
  • Versamel blomme en doen dieselfde met hulle.

2. Vorms.

2.1 Knip die vorms op die volgende bladsy uit. Kyk of elkeen van hulle presies in die helfte gevou kan word. Dié vou is ook 'n simmetrie-lyn. Gebruik 'n liniaal en trek 'n stippellyn op die vou langs. Sommige vorms het meer as een simmetrie-lyn. Onthou dat die helftes identies moet wees. Teken al die symmetrie-lyne en plak die vorms op die figure hier onder. Gebruik byskrifte om die simmetrie-lyne aan te dui.

2.2 Maak ook ander vorms, byvoorbeeld 'n sirkel, en vou dit om te sien of daar simmetrie-lyne is. Plak hulle ook op 'n skoon vel papier. Gebruik byskrifte om die simmetrie-lyne aan te dui.

Aktiwiteit 3:

Om die verandering van aansig van 'n voorwerp wat vanuit verskillende posisies gesien word te beskryf [LU 3.7]

Wanneer ons 'n groot gebou van die voorkant af sien, weet ons dat dit nie dieselfde sal lyk as ons agter of aan die kant van die gebou staan nie. Dit sal ook nie dieselfde lyk as ons by 'n hoek van die gebou staan nie.

1.

1.1 Gaan gou buitentoe en kyk van die voorkant af na die skool.

1.2 Stap om die gebou na agter en kyk weer daarna.

  • Nou moet jy na die een kant toe stap en die skoolgebou van die kant af beskou.
  • Ten laaste moet jy by een van die hoeke van die skoolgebou gaan staan om te kyk hoe dit daarvandaan lyk.

Questions & Answers

what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
How can I make nanorobot?
Lily
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
how can I make nanorobot?
Lily
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Wiskunde graad 4. OpenStax CNX. Sep 18, 2009 Download for free at http://cnx.org/content/col11100/1.1
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