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Wiskunde

Nog meetkunde, datahantering en waarskynlikheid

Opvoeders afdeling

Memorandum

3 cm 2 cm 10 cm 6 cm
6 cm 4 cm 20 cm 24 cm
9 cm 6 cm 30 cm 54 cm
15 cm 10 cm 50 cm 150 cm
3. (a)

(b) 2 keer meer; 3 keer meer;

5 keer meer as eerste reghoek

(c) 16 keer

4.2.1 – 4.2.4 Kontroleer leerders se poging

Leerders afdeling

Inhoud

Aktiwiteit: vergelyk groottes [lu 4.2, lu 3.8]

3. KOM ONS VERGELYK GROOTTES!

Die volgende reghoek is eers twee keer, dan drie keer en dan vyf keer vergroot.

Al die reghoeke het dieselfde verhouding vir lengte tot breedte: 3:2

a) Kyk nou weer na die reghoeke hierbo. Gestel elke blokkie is 1 cm by 1 cm. Voltooi die tabel.

Reghoek Lengte Breedte Omtrek Oppervlakte
1 ____________ ____________ ____________ ____________
2 ____________ ____________ ____________ ____________
3 ____________ ____________ ____________ ____________
4 ____________ ____________ ____________ ____________

b) Wat gebeur met die omtrek soos die reghoek elke keer vergroot?

_____________________________________________________________________

_____________________________________________________________________

c) Hoeveel keer is die oppervlakte groter as jy die reghoek vier keer vergroot?

_____________________________________________________________________

4.1 Het jy geweet?

Die verhouding op skaal word altyd in ’n bepaalde volgorde geskryf:

Die eerste getal hou verband met die tekening / plan .

Die tweede getal hou verband met die werklike lewe .

’n Skaal van 1 : 5 beteken die lengte is 5 maal kleiner as in die werklike lewe.

’n Skaal van 5 : 1 beteken die lengte is 5 maal groter as in die werklike lewe.

4.2.1 Gebruik die blokkiespapier en vergroot die skets op ’n skaal van 4:1.

4.2.2 Vergroot hierdie tekening op ’n skaal van 1 : 2.

4.2.3 Verklein die skets tot skaal 2 : 1.

4.2.4 KOPKRAPPER!

  • Kan jy hierdie tekening vergroot en oorteken?

Assessment

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 3.8: Dit is duidelik wanneer die leerder posisie/ligging op koördinaatstelsels (geordende roosters) en kaarte bepaal.

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.

Questions & Answers

calculate molarity of NaOH solution when 25.0ml of NaOH titrated with 27.2ml of 0.2m H2SO4
Gasin Reply
what's Thermochemistry
rhoda Reply
the study of the heat energy which is associated with chemical reactions
Kaddija
How was CH4 and o2 was able to produce (Co2)and (H2o
Edafe Reply
explain please
Victory
First twenty elements with their valences
Martine Reply
what is chemistry
asue Reply
what is atom
asue
what is the best way to define periodic table for jamb
Damilola Reply
what is the change of matter from one state to another
Elijah Reply
what is isolation of organic compounds
IKyernum Reply
what is atomic radius
ThankGod Reply
Read Chapter 6, section 5
Dr
Read Chapter 6, section 5
Kareem
Atomic radius is the radius of the atom and is also called the orbital radius
Kareem
atomic radius is the distance between the nucleus of an atom and its valence shell
Amos
Read Chapter 6, section 5
paulino
Bohr's model of the theory atom
Ayom Reply
is there a question?
Dr
when a gas is compressed why it becomes hot?
ATOMIC
It has no oxygen then
Goldyei
read the chapter on thermochemistry...the sections on "PV" work and the First Law of Thermodynamics should help..
Dr
Which element react with water
Mukthar Reply
Mgo
Ibeh
an increase in the pressure of a gas results in the decrease of its
Valentina Reply
definition of the periodic table
Cosmos Reply
What is the lkenes
Da Reply
what were atoms composed of?
Moses Reply
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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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