Enquires about Maths question types

anpanman SG

Hi, I met with some difficulties for the 2oo7 tys E maths paper. firstly, their vector question shows 3 tirangles on a grid and the question given is : the translation T, maps triangle A onto triangle B. Write down the column vector representng T. Then there are those anticlockise rotation of maps, etc.

I don't seem to encounter such questions ever in my 2 years of upper sec education. is the syllabus out? and the construction question is also strange to e. they give a you drawing of a quadrilateral and ask you to construct a locus. I never know what a locus is. Is that required in the syllabus of e maths for 2009?

*edited: anyone know if there are angle angle properties relating to trpazium? eg. sum of opposite angles = 180? can you list down the properties of trapezium for me. thanks!

the Bear SG

%$*#

i only learnt vectors for A-levels!!

and i did Math C and Further Math!!

Mikethm SG

Dun worry. All these no need know already.

Dejomel SG

I believe trapezium is still counted as an n-sided polygon.

Therefore total sum of interior angles is

(n-2) x 180* = 360*

anpanman SG

thanks for the useful info everyone!

so opposite angle of trapezium is not equal to 180 deg? by the way, for vector questions, if our answer is 1/4 (a+b) , do we have to expand out to 1/4a + 1/4b or leave it in simplified form?

TrueHeart SG

thanks for the useful info everyone!

so opposite angle of trapezium is not equal to 180 deg? by the way, for vector questions, if our answer is 1/4 (a+b) , do we have to expand out to 1/4a + 1/4b or leave it in simplified form?

Hi anpanman,

I believe that it will be more appropriate to expand it out rather than to "factorise" it, since it is a vector. I don't think there will be any penalising for not expanding it out though at E. Maths lvl.

Cheers.

anpanman SG

Hi anpanman,

Cheers.

I looked at TYS answers too, some are factorized, some are not. Thanks for trying to help !

Anyone has any idea about this factorizing thing too?