Question

A ,B AND C IS THREE POINTS ON A CIRCLE SUCH THAT THE ANGLE SUBTENDED BY THE CHORD AB AND AC AT THE POINT O ARE 110 AND 130 FIND BAC ?
60
75
70
80

Answer 1

Answer:

80°

Step-by-step explanation:

OA=OB=OC

∴In△OAB

∠OAB+∠OBA+∠AOB=180∘

2∠OAB=180∘−90

2∠OAB=90∘

∠OAB=45∘

In△OAC

∠OAC+∠OCA+∠AOC=180∘

2∠OAC=180∘110

∠OAC=35∘

∴∠BAC=45∘+35∘

= 80°

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Answer 2

80 deegery is the. answer