IN GIVEN FIGURE AB PARALLET TO CD AND L IS TRANSVERSAL . IF ANGLE 2 = 2 x ANGLE 1 , THEN FIND ANGLE 7 .

2=2 1    Given1+2=180°   Linear Pair1+2 1=180°3 1=180°1=60°1=7=60°        Alternate exterior angleSo , value of 7 is 60° .

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