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Wiskunde

Omtrek, oppervlakte en volume

Opvoeders afdeling

Memorandum

10.

a) Ja, oppervlakte van al 3 figure dieselfde

b) oppervlakte = (helfte x basis) x hoogte

11.1 1 867 km ²

11.2 530 m ²

11.3 9 m by 8 m

12.

13.1

a) 3 en ‘n kwart vierkante cm

b) 5 vierkante cm

13.2 A

14.1

a) 64 cm ²

b) 180 cm ²

c) 81 m ²

d) 200 m ²

14.2

a) 42 m ²

b) 48 cm ²

c) 65 cm ²

d) 64 m ²

Leerders afdeling

Inhoud

Aktiwiteit: area (kopkrapper) [lo 4.2, lo 1.9, lo 4.5]

10. KOPKRAPPER!

’n Boer verdeel sy grond soos volg tussen sy drie kinders:

a) Was die boer regverdig? __________________________ Motiveer jou antwoord:

_____________________________________________________________________

_____________________________________________________________________

b) Kan jy hieruit ’n formule neerskryf om die oppervlakte van ’n driehoek te bereken?

_____________________________________________________________________

11.1 Bereken die oppervlakte van die boer se plaas sonder die dam.

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

11.2 Wat is die oppervlakte van dié lusernkamp op die boer se plaas?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

11.3 As die boer ’n reghoekige kamp met ’n oppervlakte van 72 m 2 wil bou, maar die omtrek moet die minimum wees (vir die lengte van die draad), wat moet die afmetings van die kamp wees?

_____________________________________________________________________

12. ’n Reghoekige rugbyveld het ’n lengte van 110 m en ’n breedte van 60 m. Wat sal dit kos om gras te plant teen R6,45 per vierkante meter?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

13.1 As elke vierkant 1 cm 2 is, wat is die oppervlakte van die ingekleurde deel?

a)

_____________________________________

b)

_____________________________________

13.2 Watter figuur het die grootste oppervlakte: A of B?

A

_____________________________________

B

_____________________________________

14. KOPKRAPPERS!

  • Werk saam met ’n maat.

14.1 Kan julle die oppervlakte van die ingekleurde dele van elke figuur bepaal?

a)

_____________________________________

_____________________________________

_____________________________________

b)

_____________________________________

_____________________________________

_____________________________________

c)

_____________________________________

_____________________________________

_____________________________________

d)

_____________________________________

_____________________________________

_____________________________________

14.2 Bereken die oppervlakte van die volgende figure:

a)

_____________________________________

_____________________________________

_____________________________________

_____________________________________

b)

_____________________________________

_____________________________________

_____________________________________

_____________________________________

c)

_____________________________________

_____________________________________

_____________________________________

_____________________________________

d)

_____________________________________

_____________________________________

_____________________________________

_____________________________________

15. KLASBESPREKING

  • Kom ons gesels as ’n klas oor die volgende:

15.1 Jul skool wil ’n nuwe rekenaarlokaal oprig. Die twee planne wat voorgelê is, lyk so:

A

B

  • Bespreek:

a) Vir watter plan is die meeste bakstene nodig? Hoekom?

b) Watter plan sal die meeste rekenaars kan huisves? Motiveer.

c) Watter plan sal die duurste wees om te bou? Hoekom?

15.2 ’n Plan is ook vir ’n swembad vir die skool ingedien:

a) Wat sal met die oppervlakte gebeur as die omtrek dieselfde bly, maar:

(i) die lengte vermeerder en die breedte verminder?

(ii) die lengte verminder en die breedte vermeerder?

b) Wanneer sal die swembad ’n maksimum oppervlakte hê?

Assessering

Leeruitkomste 4: Die leerder is in staat om gepaste meeteenhede, instrumente en formules in ‘n verskeidenheid kontekste te gebruik.

Assesseringstandaard 4.2: Dit is duidelik wanneer die leerder probleme oplos;

Assesseringstandaard 4.5: Dit is duidelik wanneer die leerder berekenings doen deur die geskikte formules te gebruik;

Leeruitkomste 1: Die leerder is in staat om getalle en die verwantskappe daarvan te herken, te beskryf en voor te stel, en om tydens probleemoplossing bevoeg en met selfvertroue te tel, te skat, te bereken en te kontroleer.

Assesseringstandaard 1.9: Dit is duidelik wanneer die leerder berekenings doen deur die geskikte formules te gebruik.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
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
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
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
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Source:  OpenStax, Wiskunde graad 7. OpenStax CNX. Oct 21, 2009 Download for free at http://cnx.org/content/col11076/1.2
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