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#1 thetechroom

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Posted 24 June 2014 - 02:20

Hey guys for some reason I think Task 2 question A is worded wrong and I really am lost.

If anyone could help be much appreciated

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#2 Draconian Guppy

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Posted 24 June 2014 - 02:21

?



#3 OP thetechroom

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Posted 24 June 2014 - 02:24

?


Sorry image now attached

#4 +LogicalApex

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Posted 24 June 2014 - 02:35

Sorry image now attached

It is missing any sign you've actually tried to solve the problem...

 

Surely a web search could teach you the concepts needed to answer the question. Asking for help is where you seek clarification. This appears to be more of a "hey can you do this for me?" sort of question. Those aren't cool.



#5 zhangm

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Posted 24 June 2014 - 02:37

Exactly what is unclear? You're given an angle theta, corresponding to one sector of the circle, and a formula for finding the area using theta, as well as the total radians in a circle (hint: total minus theta gives you a new "theta" corresponding to PQN). Why not plug and chug and see where that gets you?



#6 OP thetechroom

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Posted 24 June 2014 - 02:38

It is missing any sign you've actually tried to solve the problem...

Surely a web search could teach you the concepts needed to answer the question. Asking for help is where you seek clarification. This appears to be more of a "hey can you do this for me?" sort of question. Those aren't cool.

Hey thanks for your help.... Not

If you had read my OP I think the question is worded wrong and need
clarification if this is the case

#7 +Xinok

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Posted 24 June 2014 - 02:55

Hey thanks for your help.... Not

If you had read my OP I think the question is worded wrong and need
clarification if this is the case

 

It's worded correctly.

 

Point O is at the center of the circle.

Angles POQ and NOQ split the circle into "sectors".

You know the angle of NOP; finding the other angles is trivial.

You know how to find the radius of the circle; you can find the radius from lines ON or OP.

 

If you know how to use sin and cos, you can find the width and height of the triangle, and from there, find its area.



#8 OP thetechroom

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Posted 24 June 2014 - 02:56

It's worded correctly.
 
Point O is at the center of the circle.
Angles POQ and NOQ split the circle into "sectors".
You know the angle of NOP; finding the other angles is trivial.
You know how to find the radius of the circle; you can find the radius from lines ON or OP.
 
If you know how to use sin and cos, you can find the width and height of the triangle, and from there, find its area.


Thanks mate I know exactly what to do now

#9 Shiranui

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Posted 24 June 2014 - 04:49

I really need to hit Khan Academy. I have forgotten EVERYTHING.



#10 MPKs

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Posted 24 June 2014 - 05:12

Without using any formulae:

 

1) just multiply the area of the circle by the (relevant angle)/2PI  (teachers like it when you do things in a different way)

2) Isosceles triangle so just split into 2 right angle triangles and add their areas.





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