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#1 2016-08-10 10:12:30

lofi
Member
Registered: 2016-08-10
Posts: 3

AMC Help Now!!

The circle is inscribed in a square with sides 8 cm. What is the area of the shaded part in square centimeters? Express your answer in terms of pi?

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#2 2016-08-10 10:16:04

zetafunc
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Registered: 2014-05-21
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Website

Re: AMC Help Now!!

What's the shaded part?

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#3 2016-08-10 10:18:11

lofi
Member
Registered: 2016-08-10
Posts: 3

Re: AMC Help Now!!

http://www.artofproblemsolving.com/class/1169-mathcounts-basics/homework/10
This website has the picture
I dont think the website is working

The fifth term of an arithmetic sequence is 9 and the 32nd term is -84. What is the 23rd term?

Last edited by lofi (2016-08-10 10:21:58)

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#4 2016-08-10 14:06:10

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

Re: AMC Help Now!!

The picture is only for people who are enrolled in the class, copy it and paste it in here.


The fifth term of an arithmetic sequence is 9 and the 32nd term is -84. What is the 23rd term?


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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#5 2016-08-10 17:22:40

thickhead
Member
Registered: 2016-04-16
Posts: 1,086

Re: AMC Help Now!!

lofi wrote:

The fifth term of an arithmetic sequence is 9 and the 32nd term is -84. What is the 23rd term?


{1}Vasudhaiva Kutumakam.{The whole Universe is a family.}
(2)Yatra naaryasthu poojyanthe Ramanthe tatra Devataha
{Gods rejoice at those places where ladies are respected.}

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#6 2016-08-10 19:05:58

Bob
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Registered: 2010-06-20
Posts: 10,059

Re: AMC Help Now!!

hi lofi

Welcome to the forum.

The circle is inscribed in a square with sides 8 cm. What is the area of the shaded part in square centimeters? Express your answer in terms of pi?

I think I can help here without the diagram.

You have a square 8 by 8 so its area is 64.

The circle fits inside so that it just touches the sides of the square.  So its diameter is 8 and so radius 4.  area = pi x 4squared.

I'm guessing the shaded bit is the part inside the square but outside the circle.

So subtract the second area from the first.

Bob


Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob smile

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