O is the center of oprove that angel a =angle b+angle c
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o is the centre of the triangle
therefore angle A=angle B is opp. angles
angleB=angleC ...alternate angle
therefore angle B +angle c = 180
angle a= 180
therefore angle A=angle B is opp. angles
angleB=angleC ...alternate angle
therefore angle B +angle c = 180
angle a= 180
shivam2213000:
wrong
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