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More geometry, data handling and probability

Educator section



(a) 8

(b) 7,5 (7 and a half)

(c) 7,3

12.5 Internet

Leaner section


Activity: methods to gather information [lo 5.1, lo 5.2, lo 5.3, lo 5.6, lo 5.9]


12.1 Yes / No Answers

a) Interview any member of your family and tick the applicable block:

Yes No
Do you readily eat cabbage?
Do you like sport?
Do you watch TV longer than 2 hours per day?
Do you take any medication?
Do you suffer from asthma?
Do you like pizza?
Do you own a car?
Do you have brothers and/or sisters?
Are you the oldest child?
Do you work full-time?
Do you have high blood-pressure?
Do you think the petrol price will increase?
Do you think the interest rate will be increased this year?

b) Where, do you think, are questionnaires like this one regularly used?



12.2 Variety of answers

12.2.1 Now interview another family member and write down his/her answers:

a) What is your occupation? _________________________________________

b) How many children do you have? ___________________________________

c) What is your favourite TV program? ________________________________

d) What book have you read recently? _________________________________

e) What kind of car do you drive? ____________________________________

f) What kind of music do you like to listen to? __________________________

g) What is the greatest crisis in our country, do you think? _________________


h) What, according to you, must our government give immediate attention to? _______________________________________________________________


i) Why is the Rand so unsteady? ______________________________________


j) Why do food prices keep on rising? _________________________________


12.2.2 Divide into groups of three and compare your answers.

12.2.3 Where would questionnaires that have a variety of possible answers, normally be used?



12.3 Given information

  • Sometimes you get the answers you are looking for from given information.

a) Cut out an advertisement form the newspaper that advertises the most expensive house. Stick it in the block below.

b) Consult your advertisement and complete the following:

i) Price of the house: _______________________________________________

ii) Suburb/Town/City: ______________________________________________

iii) Number of bedrooms: ____________________________________________

iv) Number of bathrooms: ____________________________________________

v) Number of garages: ______________________________________________

vi) Other rooms mentioned:

Questions & Answers

anyone know any internet site where one can find nanotechnology papers?
Damian Reply
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Mathematics grade 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11075/1.1
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