If A(z1),B(z2),C(z3) are the vertices of the triangle ABC such that (z1−z2)/(z3−z2)=(1/√2)+(i/√2), the triangle ABC is
A
Equilateral
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B
Right angled
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C
Isosceles
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D
Obtuse angled
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Solution
The correct option is C Isosceles z1−z2z3−z2=1+i√2 Taking modulus we get |z1−z2z3−z2|=1 |z1−z2|=|z3−z2| Therefore, two arms of the triangle have equal length. Hence the triangle is isosceles.