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Co-ordinate geometry
If PA and PBB are tangents to the circle at A and B respectively and the chord BC is parallel to the tangent PA , If AC is 6cm and the length of the tangent AP is 9 cm. Then what is the length of the chord BC. ?
A. 8
B. 4
C. 6
D. 5
Read Solution (Total 4)
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- it will be 6 not 100% sure
- 9 years agoHelpfull: Yes(4) No(1)
- PA = PB = 9 cm ( Length of tangents from an external point)
Angle PAB = Angle ABC ( alternate angles PA !! BC)
AC = AB = 6 cm Triangles PAB and ACB are Isoscelles and sre similar triangles
(They are equiangular)
Taking the ratios of respective sides BC/AB = AC/PB
BC/6 = 6/9
BC = 4 cm - 9 years agoHelpfull: Yes(3) No(12)
- plz explain ans....
- 9 years agoHelpfull: Yes(0) No(0)
- Please explain ans clearly...
- 4 years agoHelpfull: Yes(0) No(0)
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