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In a triangle ABC, the sides AB and AC ...

In a `triangle ABC`, the sides AB and AC are extended to P and Q respectively. The bisectors of `angle PBC` and `angle QCB` intersect at a point R. If `angle R= 66^@`, then the measure of `angle A` is :
त्रिभुज ABC में, AB और AC भुजाओं को क्रमशः P और Q तक बढ़ाया जाता है| `angle PBC` तथा `angle QCB` के द्विभाजक एक बिंदु R पर मिलते हैं | यदि `angle R= 66^@`, है, तो कोण A का मान ज्ञात करें |

A

`36^@`

B

`24^@`

C

`48^@`

D

`72^@`

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