Q&A - PSLE Math

[pensiveowl]

Hi, could someone pls help us work this out:


http://www.positivelyquit.org/images/q17.jpg\">

Thanks

[IMTRYINGSTUFF]

bobsg01:

Need help to find Angle a, b, d, e


Thanks in advance for your help.

http://i55.tinypic.com/oa645d.jpg\">

Is is 239˚???

180-65(big triangle)=115˚(a and b)
180-56(DFC)=124˚(e and d)
124+115=239˚(a and b and d and e)

[atutor2001]

deleted

[atutor2001]

pensiveowl:

Hi, could someone pls help us work this out:


http://www.positivelyquit.org/images/q17.jpg\">

Thanks

Not sure if my mind is still working as it appears to be very tedious to get the shaded area if area A is not given.

Finding area A alone is a nightmare to me. I would need to use Pythagoras theorem just to find area A. Hope some math guru can come out with an easy solution

[Andrew Lee]

http://i52.tinypic.com/nmzzep.jpg\"> :frustrated:

[Belle2011]

Dear all,

I need some help, please.

Ahmad and Halim together took 5 days to paint their house. If Ahmad and Halim work together for 2 days, followed by Ahmad working alone for 8 days, Halim will take 1 more day to complete the remaining work. How long will Ahmad take to paint the house all by himself?

Thank-you.

[pensiveowl]

atutor2001:

pensiveowl:

Hi, could someone pls help us work this out:


http://www.positivelyquit.org/images/q17.jpg\">

Thanks

Not sure if my mind is still working as it appears to be very tedious to get the shaded area if area A is not given.

Finding area A alone is a nightmare to me. I would need to use Pythagoras theorem just to find area A. Hope some math guru can come out with an easy solution

Thanks for trying.. just fyi, the answers are supposed to be:
(a) 484pi + 3872 - 2A
(b) 132pi

[MathIzzzFun]

pensiveowl:

atutor2001:

[quote=\"pensiveowl\"]Hi, could someone pls help us work this out:


http://www.positivelyquit.org/images/q17.jpg\">

Thanks

Not sure if my mind is still working as it appears to be very tedious to get the shaded area if area A is not given.

Finding area A alone is a nightmare to me. I would need to use Pythagoras theorem just to find area A. Hope some math guru can come out with an easy solution

Thanks for trying.. just fyi, the answers are supposed to be:
(a) 484pi + 3872 - 2A
(b) 132pi[/quote]Hi

http://i53.tinypic.com/9kwmqp.jpg\">

(leaving the construction lines in the figure cos quite a task to remove them )

cheers.

[pensiveowl]

Hi


http://i53.tinypic.com/9kwmqp.jpg\">

(leaving the construction lines in the figure cos quite a task to remove them )

cheers.[/quote]


Wah! thanks MathIzzzFun

[MathIzzzFun]

pensiveowl:

Hi


http://i53.tinypic.com/9kwmqp.jpg\">

(leaving the construction lines in the figure cos quite a task to remove them )

cheers.


Wah! thanks MathIzzzFun

u r welcome.

Happy National Day to all !

cheers.