In fig: 6.14, lines XY and MN intersect...

In fig: 6.14, lines XY and MN intersect at O. If `/_P O Y=90^@`and `a : b=2:3`, find c.

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Line OP is perpendicular to line XY. Hence` ∠POY = ∠POX = 90^@`
`∠POX = ∠POM + ∠MOX`
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