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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

the diagram of the digestive system
Assiatu Reply
How does twins formed
William Reply
They formed in two ways first when one sperm and one egg are splited by mitosis or two sperm and two eggs join together
Oluwatobi
what is genetics
Josephine Reply
Genetics is the study of heredity
Misack
how does twins formed?
Misack
What is manual
Hassan Reply
discuss biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles
Joseph Reply
what is biology
Yousuf Reply
the study of living organisms and their interactions with one another and their environments
AI-Robot
the study of living organisms and their interactions with one another and their environment.
Wine
discuss the biological phenomenon and provide pieces of evidence to show that it was responsible for the formation of eukaryotic organelles in an essay form
Joseph Reply
what is the blood cells
Shaker Reply
list any five characteristics of the blood cells
Shaker
lack electricity and its more savely than electronic microscope because its naturally by using of light
Abdullahi Reply
advantage of electronic microscope is easily and clearly while disadvantage is dangerous because its electronic. advantage of light microscope is savely and naturally by sun while disadvantage is not easily,means its not sharp and not clear
Abdullahi
cell theory state that every organisms composed of one or more cell,cell is the basic unit of life
Abdullahi
is like gone fail us
DENG
cells is the basic structure and functions of all living things
Ramadan
What is classification
ISCONT Reply
is organisms that are similar into groups called tara
Yamosa
in what situation (s) would be the use of a scanning electron microscope be ideal and why?
Kenna Reply
A scanning electron microscope (SEM) is ideal for situations requiring high-resolution imaging of surfaces. It is commonly used in materials science, biology, and geology to examine the topography and composition of samples at a nanoscale level. SEM is particularly useful for studying fine details,
Hilary
cell is the building block of life.
Condoleezza Reply
what is cell divisoin?
Aron Reply
Diversity of living thing
ISCONT
what is cell division
Aron Reply
Cell division is the process by which a single cell divides into two or more daughter cells. It is a fundamental process in all living organisms and is essential for growth, development, and reproduction. Cell division can occur through either mitosis or meiosis.
AI-Robot
What is life?
Allison Reply
life is defined as any system capable of performing functions such as eating, metabolizing,excreting,breathing,moving,Growing,reproducing,and responding to external stimuli.
Mohamed
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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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