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Official answer is E, but I chose C.
What I wonder is, if EG bisects DF, shouldnt the triangle be an isoscles triangle? and if angle EDF is 60, i thought it would be equilaterial.
But the explanation says if EDF is 60 degrees, DEF can be 90 degrees and and DFE 30, so the answer is E. But I think in this case EG cannot bisect DF?
Posted from my mobile device
What I wonder is, if EG bisects DF, shouldnt the triangle be an isoscles triangle? and if angle EDF is 60, i thought it would be equilaterial.
But the explanation says if EDF is 60 degrees, DEF can be 90 degrees and and DFE 30, so the answer is E. But I think in this case EG cannot bisect DF?
Posted from my mobile device
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01 Sep 2018, 22:45
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minana
If statement 1 says EG bisects DF, then there is no reason not to believe this.
Take these statements (1 and 2 ) in DS questions as facts
Let us come to the question .
When EG bisects DF say at point O , the only information we have is that DO=OF
we do not have any information on the angles
statement 1 is insufficient
statement 2 says EDF = 60
again on its own statement 2 is insufficient.
the other two angles E+F=120 , and can take various values
using both the statements
DO=OF and EDF=60
We still cannot ascertain the value of DFE
so the answer should be E
