Complex NumbersHard

Question

If a, b, c and u, v, w are the complex numbers representing the vertices of two triangles such that c = (1 - r) a + rb and w = (1 - r) u + rv, where r is a complex number, the the two triangles

Options

A.have the same area
B.are similar
C.are conguent
D.None of these

Solution

Since a, b, c and u, v, w are the vertices of two triangles.
Also, c = (1- r)a + rb and w = (1- r)u + rv .........(i)
Consider      
Applying   R3  → R3 -{(1-r)R1 + rR2}
    
       [form Eq. (i)]
     = 0
Hence, two triangles are similar.

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