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Question

In the given diagram, AB is parallel to PQ. If a right triangle can be constructed with POX and BOY as two of its angles, then find the value of POX.


A

90

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B

60

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C

45

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D

30

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Solution

The correct option is C

45


We know that, one of the angles of a right angled triangle is 90° ...(i)

Given that a right triangle can be formed with POX and BOY as two of its angles.

In the given figure, POX = BOY (Alternate interior angles) ...(ii)

For any triangle, the sum of all the interior angles is 180 ...(iii)

From (i) and (iii),
POX+BOY+90=180
POX+BOY=90.

From (ii),
POX and BOY are equal,
2× POX =90°
POX =45°


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