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 February 1st, 2014, 12:35 PM #1 Newbie   Joined: Jan 2014 Posts: 25 Thanks: 0 A square is 9 cm side and its area corresponds to 45% Good afternoon staff forum. A square is 9 cm side and its area corresponds to 45% of the area of a rectangle. Under these conditions, what is the area of the rectangle? 150 cm ² 160 cm ² 180 cm ² 200 cm ² n.d.a.
 February 1st, 2014, 02:40 PM #2 Senior Member   Joined: Aug 2012 Posts: 2,204 Thanks: 647 Re: A square is 9 cm side and its area corresponds to 45% Step 1: What is the area of the square? Step 2: That area is 45% of which rectangle?
 February 1st, 2014, 06:52 PM #3 Newbie   Joined: Feb 2012 Posts: 15 Thanks: 0 Re: A square is 9 cm side and its area corresponds to 45% Area=lxw (9cm)^2=81cm^2 81cm^2/0.45=180cm^2 180cm^2 is the area of the rectangle
 February 2nd, 2014, 09:31 AM #4 Newbie   Joined: Jan 2014 Posts: 25 Thanks: 0 Re: A square is 9 cm side and its area corresponds to 45% Friend not understand how you reached 180. 9x9 = 81 ta good 2/0.45? would not ---- 90 = 81 = 90 = 171? hum    ^ 2/0.45 = 81 cm 180 cm ^ 2 att; Itamar
February 2nd, 2014, 09:34 AM   #5
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Re: A square is 9 cm side and its area corresponds to 45%

Quote:
 Originally Posted by itamaratento Friend not understand how you reached 180. 9x9 = 81 ta good 2/0.45? would not ---- 81 + 90 = 171? hum    ^ 2/0.45 = 81 cm 180 cm ^ 2 att; Itamar

 February 2nd, 2014, 10:10 AM #6 Senior Member     Joined: Sep 2007 From: USA Posts: 349 Thanks: 67 Math Focus: Calculus Re: A square is 9 cm side and its area corresponds to 45% Happysmiles374 is correct.
 February 2nd, 2014, 10:36 AM #7 Newbie   Joined: Jan 2014 Posts: 25 Thanks: 0 Re: A square is 9 cm side and its area corresponds to 45% good afternoon friend    Can you show me another way to do this account. more simplified, I am not able to understand the logic .. Another example has to be able to teach me ... thanks
 February 2nd, 2014, 10:46 AM #8 Senior Member     Joined: Sep 2007 From: USA Posts: 349 Thanks: 67 Math Focus: Calculus Re: A square is 9 cm side and its area corresponds to 45% OK. The area of the square is S and the area of the triangle is T. The area of the square is S=9cm * 9cm=81cm^2. It also says .45T=S. So, solve for T. T=S/.45=81/.45=180cm^2.
February 2nd, 2014, 10:50 AM   #9
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Re: A square is 9 cm side and its area corresponds to 45%

Quote:
 Originally Posted by itamaratento good afternoon friend    Can you show me another way to do this account. more simplified, I am not able to understand the logic .. Another example has to be able to teach me ... thanks
What is 45% of 180?

 February 2nd, 2014, 11:01 AM #10 Newbie   Joined: Jan 2014 Posts: 25 Thanks: 0 Re: A square is 9 cm side and its area corresponds to 45% hello, then have to divide 1.8 81/.45 will give it me?

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### square with 9 cm sides

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