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Sunday, November 19 2017 @ 11:53 AM CST
 Forum Index >  Test Paper Related >  Primary 6 Matters
 Question on area/perimeter of circles
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By: keenlearner (offline)  Thursday, December 20 2012 @ 09:19 AM CST (Read 916 times)  
keenlearner

The figure in attachment is made up of 3 circles with the same radius 10cm.
X, Y and Z are the centres of the circles respectively. For each of the following, use the calculator value of 'pi" to find.

(a) the perimeter if the shaded parts, correct to 2 decimal places. (Ans: 83.78cm)

(b) the area of the shaded parts, correct to 2 decimal places.(Ans: 209.44cm2)

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By: echeewh (offline)  Thursday, December 20 2012 @ 06:26 PM CST  
echeewh

Hey keenlearner,

I think you have missed out "pi" in the following statement (quoted from your question) :

For each of the following, use the calculator value of to find.

It should read as (if I am correct) :

For each of the following, use the calculator value of "pi" to find.

-----------
Pls note it will be better if you can also provide the Answerkey to your question , where applicable.

Kindly refer to the attached document for my worked solution, and do let me know again if this is different from your Answerkey or if there's further clarification.

Cheers,
Edward

NOTE: My apologies to all readers. Worked solution was posted as at 22/12 , 7.20am.

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By: keenlearner (offline)  Friday, December 21 2012 @ 04:49 AM CST  
keenlearner

Hi Edward,


Thanks for pointing out the typo error. I am not able to see your work solution in the circles attachment. Cheers.

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By: echeewh (offline)  Friday, December 21 2012 @ 05:16 PM CST  
echeewh

Hi keenlearner,

Thank you for letting me know that the worked solution was not properly attached earlier.

The worked solution has now been posted.

Best regards,
Edward

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