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  • GETSenPhaseMaths display tagshide tags

    This module is included inLens: Siyavula: Mathematics (Gr. 7-9)
    By: Siyavula

    Review Status: In Review

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Vergelyk groottes

Module by: Siyavula Uploaders. E-mail the author

WISKUNDE

Nog Meetkunde, Datahantering en Waarskynlikheid

OPVOEDERS AFDELING

Memorandum

Tabel 1
3 cm2 cm10 cm6 cm
6 cm4 cm20 cm24 cm
9 cm6 cm30 cm54 cm
15 cm10 cm50 cm150 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.

Figuur 1
Figuur 1 (graphics1.png)

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.

Tabel 2
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.

Figuur 2
Figuur 2 (graphics2.png)

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

Figuur 3
Figuur 3 (graphics3.png)

4.2.3 Verklein die skets tot skaal 2 : 1.

Figuur 4
Figuur 4 (graphics4.png)

4.2.4 KOPKRAPPER!

  • Kan jy hierdie tekening vergroot en oorteken?
Figuur 5
Figuur 5 (graphics5.png)

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.

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Definition of a lens

Lenses

A lens is a custom view of the content in the repository. You can think of it as a fancy kind of list that will let you see content through the eyes of organizations and people you trust.

What is in a lens?

Lens makers point to materials (modules and collections), creating a guide that includes their own comments and descriptive tags about the content.

Who can create a lens?

Any individual member, a community, or a respected organization.

What are tags? tag icon

Tags are descriptors added by lens makers to help label content, attaching a vocabulary that is meaningful in the context of the lens.

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