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Question

Given POR=3x and QOR=(2x+10)°. If POQ is a straight line then, the value of POR is ______.


A
99°
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B
100°
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C
102°
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D
103°
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Solution

The correct option is C 102°

Given, POQ is a srtaight line.

POR+QOR=180° .... (Linear pair)
(3x)°+(2x+10)°=180°
5x+10°=180°
5x=180°10°=170°
5x=170°
x=170°5=34°

The value of POR=(3x)°=(3×34)°=102°.

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