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gmatwork

Post subject: Geometry concept Posted: Wed Feb 22, 2012 12:43 pm 


Course Students 

Posts: 187

Which quadrilaterals have opposite angles equal and for which quadrilaterals do diagonals bisect the vertex angles?





tim

Post subject: Re: Geometry concept Posted: Sun Feb 26, 2012 5:29 am 


ManhattanGMAT Staff 

Posts: 4758 Location: Southwest Airlines, seat 21C

if both pairs of opposite angles are congruent, it is a parallelogram; if only one pair is congruent, there is no specific name for such a quadrilateral..
if both diagonals bisect their respective vertex angles, you have a rhombus. if only one diagonal does this, it is called a kite..
_________________ Tim Sanders Manhattan GMAT Instructor





gmatwork

Post subject: Re: Geometry concept Posted: Tue Apr 10, 2012 8:44 pm 


Course Students 

Posts: 187

do diagonals of a parallelogram bisect their respective vertex angles?





tim

Post subject: Re: Geometry concept Posted: Tue Apr 17, 2012 7:25 pm 


ManhattanGMAT Staff 

Posts: 4758 Location: Southwest Airlines, seat 21C

only if that parallelogram is also a rhombus..
_________________ Tim Sanders Manhattan GMAT Instructor





