March 24th, 2014, 10:51 AM  #11  
Senior Member Joined: Nov 2013 Posts: 247 Thanks: 2  Re: Height unknown but need area. Quote:
and the other one that I had will work for quadrilaterals internally tangent to a circle such as squares, rectangles, and isoscoles trapezoids but not the ones you can't inscribe in a circle with each vertex meeting a point on it or 1 point being outside the circle. That is this: For example a 5 * 5 square (is this right) And I would get the same thing with this:  
March 24th, 2014, 12:07 PM  #12  
Newbie Joined: Mar 2014 Posts: 10 Thanks: 0  Re: Height unknown but need area. Quote:
~Cheezees Fiverr.com/Cheezees  
March 24th, 2014, 01:18 PM  #13  
Senior Member Joined: Sep 2012 From: British Columbia, Canada Posts: 764 Thanks: 53  Re: Height unknown but need area. Quote:
 
March 24th, 2014, 01:25 PM  #14  
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,597 Thanks: 1038  Re: Height unknown but need area. Quote:
 
March 24th, 2014, 01:37 PM  #15  
Newbie Joined: Mar 2014 Posts: 10 Thanks: 0  Re: Height unknown but need area. Quote:
 
March 24th, 2014, 04:32 PM  #16  
Senior Member Joined: Nov 2013 Posts: 247 Thanks: 2  Re: Height unknown but need area. Quote:
 
March 25th, 2014, 02:48 AM  #17  
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,597 Thanks: 1038  Re: Height unknown but need area. Quote:
 
March 25th, 2014, 06:30 AM  #18  
Newbie Joined: Mar 2014 Posts: 10 Thanks: 0  Re: Height unknown but need area. Quote:
 
March 25th, 2014, 08:54 AM  #19  
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,597 Thanks: 1038  Re: Height unknown but need area. Quote:
I'm trying to follow this rule: viewtopic.php?f=42&t=35190  
March 30th, 2014, 09:21 AM  #20 
Senior Member Joined: Nov 2013 Posts: 247 Thanks: 2 
Okay so why is a parallelogram a special case of a trapezoid? As far as I know trapezoids have 1 pair of parallel sides while parallelograms have 2. I understand why the 3 sides equal trapezoid is a special case of the isosceles trapezoid and that is because the word isosceles means at least 2 sides are equal, meaning that anything equilateral is isosceles. What I don't understand is how the 2 pairs of parallel sides on a parallelogram makes it a special case of the trapezoid in general.


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