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In the diagram, the value of x + y = 220o. Find the value of n.



Dicussion (1)

  • y + z = 180o

    z = 180o - y

    x + k = 180o

    k = 180o - x

    the sum of angles in the \(\bigtriangleup\) are: n + z + k = 180

    but n + 180o - y + 180o - x = 180o

    n + 180o - y - x = 0

    but we want to find n

    n + 180o = x + y

    but x + y = 220o

    n + 180o = 220o

    n = 220o - 180o

    n = 40o

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