Home » Past Questions » Mathematics » In the diagram, ST//PQ reflex angle SRQ = 198o and < RQP = 72o. Find the value ...

In the diagram, ST//PQ reflex angle SRQ = 198o and < RQP = 72o. Find the value ...



Dicussion (1)

  • R +198 = 360(angles at a point)

    R = 360 - 198 = 162o

    C = 72(alternate angle), b + c = 180(angles or straight line)

    b = 190 - c = 180 - 72 = 108

    a + b = R = 162

    a = R - b = 162 - 108

    = 54, but a = y(alternate angles)

    y = 54o

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