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We bring out the identity between two ways of defining a single parameter tocombine positional & strength asymmetries of extended extragalactic doubleradio sources associated with active galaxies. Thus, (r.s - 1)/[(1 + r).(1 +s)], combining arm ratio r (defined to be <= 1, i.e., shorter to longer arm) &strength ratio s (in the sense closer to farther, so that it may be <, > or =1), is identical to -(1/2)[(1 - fr)/(1 + fr) - t], where fr is strength ratiodefined >= 1 (i.e., stronger to weaker), & t = +/- (Q - 1)/(Q + 1), +/- signsapplying respectively to doubles with closer hotspot fainter & those withcloser hotspot brighter, while Q is arm ratio defined >= 1.  Keywords: active galaxies - double radio sources - bilateral symmetry - armratio - flux ratio

Relation between positional & strength asymmetries of double radio sources associated with active galaxies