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Wiskunde

Ruimte en vorm

Opvoeders afdeling

Memorandum

15.2 (a) konkaaf

  1. konkaaf
  2. konveks

16.1 (a) ruit

(b) trapesium

(c) oktogoon (8-hoek)

(d) vierhoek

veelhoek

(e) heksagoon (6-hoek)

(f) heptagoon (7-hoek)

(g) pentagoon (5-hoek)

(h) parallelogram

16.2

16.3 108°

17.1 OOREENKOMSTE

* 4 ewe lang sye

sye

* hoeklyne halveer mekaar

  • 4 hoeke

VERSKILLE

* ruit se hoeke nie 90° nie

17.2 OOREENKOMSTE

* het 2 pare ewe lang sye

* 2 teenoorstaande sye is ewe lank /

* het 4 hoeke

* hoeklyne halveer mekaar /

VERSKILLE

* parallelogram se hoeke nie 90 ° nie/

18.

(a) vlieër

(b) trapesium

20.2 plafonne; hekke; dakkappe; brûe; steierwerk

Leerders afdeling

Inhoud

Aktiwiteit: veelhoeke [lu 3.1, lu 2.3]

15. VEELHOEKE

15.1 Het jy geweet?

Meetkundige vorms wat deur reguit lyne omsluit word, noem ons veelhoeke . Dit bestaan uit sye , hoeke en hoekpunte .

15.2 Het jy ook geweet?

’n Veelhoek is konveks as al die lyne wat enige twee hoekpunte verbind binne die veelhoek val.

Al die binnehoeke is skerp- of stomp-hoeke.

As enige lyn wat twee hoekpunte verbind buite ’n veelhoek val, is die veelhoek konkaaf.

Een of meer van die binnehoeke is ’n inspringende hoek.

15.2.1 Is die volgende veelhoeke konveks of konkaaf?

a)

_________________________________

b)

_________________________________

c)

_________________________________

15.3 Onthou ook!

’n Reëlmatige veelhoek se sye is almal ewe lank en die hoeke is almal ewe groot.

Hoe meer sye ’n reëlmatige veelhoek het, hoe groter is sy binnehoeke.

’n Onreëlmatige veelhoek se sye is almal verskillende lengtes.

15.4 LET WEL!

Ons kan die grootte van die hoeke van ’n reëlmatige veelhoek met behulp van ’n formule bereken:

Grootte van elke hoek =
(aantal sye – 2) × 180°
aantal sye

bv. Seshoek:

16.1 Werk saam met ’n maat. Kan julle sê wat elkeen van die volgende veelhoeke genoem word? Skryf die naam binne-in elke figuur.

a)

b)

c)

d)

e)

f)

g)

h)

16.2 Bereken die grootte van elke hoek van die aghoek (oktogoon)

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

16.3 Wat is die grootte van elke hoek van ’n vyfhoek? (pentagoon)

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

17.1 Werk in groepe van drie. Sny stroke van stewige karton of gebruik roomys-stokkies. Maak gaatjies op die punte en heg die stroke met splitpennetjies. Bou ’n vierkant.

Vergelyk nou die vierkant met die ruit en kyk of julle die volgende kan voltooi:

  • Druk op die hoekpunt en verander dit in ’n ruit:

OOREENKOMSTE

tussen ruit en vierkant

_____________________________________________________________________

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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