amanvermagmat wrote:
Triangle ABC is isosceles but not equilateral. Out of AB, BC and AC which are the two equal sides?
(1) Exterior angle at B is acute.
(2) Exterior angle at A is obtuse.
#1
for an isosceles triangle the two interior angles are equal and third angle >90 ; eg 45:45;90
given
Exterior angle at B is acute but not sure of other two sides would have exterior angle as obtuse and interior as acute so sufficeint ; as its given that triangle is isosceles..
sufficient
#2:
angle a interal angle <90 ; which all other internal angles may or may not be <90 not clear ; insufficient
IMO A