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LA) 30 000then 2B14. In the adjacent figure, PA and PB are tangents such that PA = 6 cm and LAPB - 60', thenthe length of the chord AB(A) 3 cm (B) 12 cm (C) 8 cm (D) 9 cm |
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Answer» PA=PB=6cm(tangents from P)angle APB=60now in triangle APB PA=PBthereforeangle A= angle B(angle opposite to equal sides are equal)therefore angle A and angle B will be both 60 which means that APB is equilateral triangle and since in an equilateral triangle all sides are equalso chord AB also will be 6cmso correct option is (c) 6cm PA=PB because they are tangents and so angle A=angle B by property of triangle and Angle APB=60.. since sum of all angle in triangle is 180 degree A and B because they are equal they should be 60 degree each to make 180 degree... and so form equilateral Δso AB=PA=PB=6 cm the right and is 6 by the concepts of tangents |
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