22.In the given figure, lines PQ and RS intersect each other at point O. If∠ POR : ∠ ROQ = 5 : 7, find ∠ POS.
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- Lines PQ and RS intersect each other at point O.
Let the ratio constant be x
Therefore,
In the figure,
=
=
=
=
Now,
Calculating the measure of the angles POR and ROQ,
Now,
Therefore,
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Note:-
When two lines intersect each other at a point,
- The vertically opposite angles are always equal. For example if we see the figure is vertically opposite to and is vertically opposite to .
- The sum of all angles on a single straight line is always 180°.
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