  Math Central - mathcentral.uregina.ca  Quandaries & Queries    Q & Q    Topic: proof by contradiction   start over

4 items are filed under this topic.    Page1/1            Proof that any side of a triangle is less than half the perimeter. 2007-07-07 From Omkar:Any side of a triangle is smaller than half of its perimeter, prove this in short ?Answered by Stephen La Rocque.     An isosceles triangle 2005-01-03 From Abraham:The question is,"Triangle ABC is not isosceles.Prove that if altitude BD were drawn, it would not bisect AC."My question is If an altitude is drawn wouldn\'t that mean automatically its isosceles because, In a triangle the sides opposite congruent angles(in this case the right angles)are congruent? What am I thinking wrong?Answered by Harley Weston.     A theorem involving a trapezoid 2004-09-29 From Abraham:Given:Trapezoid ROSE with diagonals RS and EO intersecting at point M Prove:Diagonals RS and EO do not bisect each other.Answered by Harley Weston.     Root 17 is Irrational 1999-01-21 From John Murdock:If you could help me out with this I would appreciate it. Prove that the square root of 17 is irrational. Answered by Harley Weston.      Page1/1    Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.    about math central :: site map :: links :: notre site français