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Mathematicians In The House. I Need Your Help On Mensuration by AgentD12: 4:10pm On Sep 30, 2018
In the diagram EF is a chord of the circle passing through E, C and F. CD bisects EF perpendicularly at D


a) If /EF/=12cm and /CD/=2cm, Calculate the length of the radius of the circle whose segment is shown

b)If O is the centre of the completed circle, calculate the area of sector OEC correct to 3s.f
__
^(pie)=3.142

Re: Mathematicians In The House. I Need Your Help On Mensuration by Ayomide002: 4:13pm On Sep 30, 2018
Wish I could help but I'm kind of busy now...send it to mathematics thread on nairaland...I'm sure someone will help with that.
Re: Mathematicians In The House. I Need Your Help On Mensuration by Homeboiy: 4:20pm On Sep 30, 2018
Ah I'm hungry now,maybe I have will look into it

or send it to mathematics close clnic
Re: Mathematicians In The House. I Need Your Help On Mensuration by AgentD12: 4:22pm On Sep 30, 2018
Anytime u are ready?
Re: Mathematicians In The House. I Need Your Help On Mensuration by economia: 4:51pm On Sep 30, 2018
.
Re: Mathematicians In The House. I Need Your Help On Mensuration by rickyboss333: 5:22pm On Sep 30, 2018
Here's your answer... let me know if u need more clarification.

5 Likes

Re: Mathematicians In The House. I Need Your Help On Mensuration by rickyboss333: 5:28pm On Sep 30, 2018
rickyboss333:
Here's your answer... let me know if u need more clarification.

I hope it is eligible enough, if not do notify so I can resolve using bolder writing.
Re: Mathematicians In The House. I Need Your Help On Mensuration by Ademat7(m): 5:35pm On Sep 30, 2018
rickyboss333:
Here's your answer... let me know if u need more clarification.
see the power of tech,imaging if unlimited data plan is cheap in this nation
Re: Mathematicians In The House. I Need Your Help On Mensuration by AgentD12: 6:33pm On Sep 30, 2018
rickyboss333:


I hope it is eligible enough, if not do notify so I can resolve using bolder writing.


thanks, but i cant see it well
Re: Mathematicians In The House. I Need Your Help On Mensuration by rickyboss333: 6:50pm On Sep 30, 2018
AgentD12:



thanks, but i cant see it well

OK, how about now??

8 Likes

Re: Mathematicians In The House. I Need Your Help On Mensuration by ObservantFellow: 11:23pm On Sep 30, 2018
AgentD12:
In the diagram EF is a chord of the circle passing through E, C and F. CD bisects EF perpendicularly at D


a) If /EF/=12cm and /CD/=2cm, Calculate the length of the radius of the circle whose segment is shone

b)If O is the centre of the completed circle, calculate the area of sector OEC correct to 3s.f
__
^(pie)=3.142

A chord gotta be a straight line. Only an arc or the circumference of the full circle would pass through C from E to F.
Re: Mathematicians In The House. I Need Your Help On Mensuration by chimex38: 12:47pm On Oct 01, 2018
rickyboss333:


OK, how about now??
I like ur Method; short, coincise, straight to d point..
But for the benefit of others and depending on the question, this method of mine below may come in handy..
Re: Mathematicians In The House. I Need Your Help On Mensuration by chimex38: 1:04pm On Oct 01, 2018
Correction. insert unit.
32.18cm² (2 d.p) or 32.2cm² (3s.f) or
32cm²(since qtn parameters are in whole numbers)
Like I said, @rickyboss333, mine is longer.. but geometric theorems can come in handy when data parameters are scarce...
Also, Approximation varied our answers slightly in qtn 2. (36.87°≈ 37°)
All the same, urs is more efficient. smiley

Re: Mathematicians In The House. I Need Your Help On Mensuration by rickyboss333: 2:35pm On Oct 01, 2018
chimex38:

I like ur Method; short, coincise, straight to d point..
But for the benefit of others and depending on the question, this method of mine below may come in handy..

yea ur right, very true. its been pretty long I did those mensuration stuff and I can't remember those theorems otherwise I would have used ur method. I just had 2 use common sense and go straight from first principles. am glad they both came up to be dsame answer. means my head is still game (lol) cheesy
chimex38:

I like ur Method; short, coincise, straight to d point..
But for the benefit of others and depending on the question, this method of mine below may come in handy..

yea ur right, very true. its been pretty long I did those mensuration stuff and I can't remember those theorems otherwise I would have used ur method. I just had 2 use common sense and go straight from first principles. am glad they both came up to be dsame answer. means my head is still game (lol)
Re: Mathematicians In The House. I Need Your Help On Mensuration by AgentD12: 2:56pm On Oct 01, 2018
rickyboss333:


OK, how about now??

Thanks it better


I have another question pls

A doorway is made up of an arch, ABC, which is a quater of a circle of radius 2m, two uprights, CD and AE of height 3m, and a horizontal base

a) show that the perimeter of the doorway, in metres, is ^(pie)+6+2root2

b)find a similar expression for the area of the doorway in terms of root2 and pie, simplifying ur answer as far as possible.[if required,take sin45=Cos45=1/root2

Re: Mathematicians In The House. I Need Your Help On Mensuration by rickyboss333: 7:48pm On Oct 01, 2018
sorry am just seeing the question now. here is your answer...

Re: Mathematicians In The House. I Need Your Help On Mensuration by rickyboss333: 7:56pm On Oct 01, 2018
B.

Re: Mathematicians In The House. I Need Your Help On Mensuration by AgentD12: 6:51pm On Oct 02, 2018
rickyboss333:
B.

Thanks. Sorry bt i ve another one

A circular table top of radius 1m has an inner section of radius 75cm which is made of glass and an outer section of wood. If glass cost #2500 per m2(square), and wood cost #1500 per m2, what is the cost of the top of the table, correct to the nearest naira?
Re: Mathematicians In The House. I Need Your Help On Mensuration by rickyboss333: 8:53pm On Oct 02, 2018
AgentD12:


Thanks. Sorry bt i ve another one

A circular table top of radius 1m has an inner section of radius 75cm which is made of glass and an outer section of wood. If glass cost #2500 per m2(square), and wood cost #1500 per m2, what is the cost of the top of the table, correct to the nearest naira?

Re: Mathematicians In The House. I Need Your Help On Mensuration by rickyboss333: 8:58pm On Oct 02, 2018
AgentD12:


Thanks. Sorry bt i ve another one

A circular table top of radius 1m has an inner section of radius 75cm which is made of glass and an outer section of wood. If glass cost #2500 per m2(square), and wood cost #1500 per m2, what is the cost of the top of the table, correct to the nearest naira?
but come o, where are all these questions springing out from?

1 Like

Re: Mathematicians In The House. I Need Your Help On Mensuration by AgentD12: 12:16pm On Oct 07, 2018
rickyboss333:
but come o, where are all these questions springing out from?
NGM Textbook Book ss 3
pls i have two more

Re: Mathematicians In The House. I Need Your Help On Mensuration by rickyboss333: 2:58pm On Oct 07, 2018
AgentD12:


NGM Textbook Book ss 3

pls i have two more

To be honest with u, at this stage am not sure if am doing u any good by solving these questions for u to simply copy. I guess they are assignments and assignments are meant to expose and challenge your understanding of the subject matter. I wish I was opportuned to have a one on one dealing with u, to explain and tutor u so that u could always help yourself and understand the subject better. I would advice u get a private tutor. please, i mean no offense

1 Like

Re: Mathematicians In The House. I Need Your Help On Mensuration by TissuePaper: 9:14pm On Oct 07, 2018
rickyboss333:


To be honest with u, at this stage am not sure if am doing u any good by solving these questions for u to simply copy. I guess they are assignments and assignments are meant to expose and challenge your understanding of the subject matter. I wish I was opportuned to have a one on one dealing with u, to explain and tutor u so that u could always help yourself and understand the subject better. I would advice u get a private tutor. please, i mean no offense
cheesy cheesy I saw this coming
Re: Mathematicians In The House. I Need Your Help On Mensuration by chimex38: 7:38pm On Oct 11, 2018
TissuePaper:
cheesy cheesy I saw this coming
Lol.. Me too. S/He keeps on asking qtns after qtns without even asking how the previous one was solved or challenges encountered in understanding them..
"Sorry I have one more.
Sorry I have 2 more"
Re: Mathematicians In The House. I Need Your Help On Mensuration by TissuePaper: 8:21pm On Oct 11, 2018
chimex38:

Lol.. Me too. S/He keeps on asking qtns after qtns without even asking how the previous one was solved or challenges encountered in understanding them..
"Sorry I have one more.
Sorry I have 2 more"
the guy is an unserious man grin

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