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Sunday, January 21, 2007
"GRE GEOMETRY QUESTION OF THE DAY"
Which of the following sets of co-ordinates does not represent the vertices of an isosceles triangle.
A) (0,2), (0,-2), (2,0) B) (1,3), (1,5), (3,4) C) (1,3), (1,7), (4,5) D) (2,2), (2,0), (1,1) E) (2,3), (2,5), (3,3)
the first option is ruled out by observation. in options b,c,d:two points have their x-coordinates same but y-coordinates different.the remaining third point has the y-coordinate in middle of the y-coordinates of the other two points. for eg,consider option c:A(1,3),B(1,7),C(4,5) pts A and B have their x-coordinates equal. y-coordinate of C is in middle of the y-coordinates od A and B. so,it will form an isoceles triangle.
correct answer is ---
ReplyDeleteE
the first option is ruled out by observation.
in options b,c,d:two points have their x-coordinates same but y-coordinates different.the remaining third point has the y-coordinate in middle of the y-coordinates of the other two points.
for eg,consider option c:A(1,3),B(1,7),C(4,5)
pts A and B have their x-coordinates equal.
y-coordinate of C is in middle of the y-coordinates od A and B.
so,it will form an isoceles triangle.
SO ANSWER IS E
E
ReplyDeleteE
ReplyDeleteE...
ReplyDeleteThe last choice is a right angles triangle....