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1 June, 20:54

1 and 2 are a linear pair, and 2 and 3 are vertical angles. m 2 = (5+4 y) and m 3 = (6 y-25). what is m 1

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  1. 1 June, 22:03
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    Vertical angles are equal to each other:

    ∠2 = ∠3

    5 + 4y = 6y - 25

    → 30 = 2y

    → 15 = y

    ∠2 = 5 + 4y = 5 + 4 (15) = 5 + 60 = 65

    linear pairs equal 180:

    ∠1 + ∠2 = 180

    → ∠1 + 65 = 180

    → ∠1 = 115
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