calculate the angle with lettees O is the centre
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We know that Central angle is twice of radius angle. So The angle O is 2×40° = 80°
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Priyajit:
Why ? Haven't you understand mine ?
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i just name the triangle because it makes it easy for me
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their is a theorem that is if an arc sobtend angle at Centre and on the circle also then the angle at the centre is twice of the angle on the circle
actually their is a theorem it is that when an arc subtend angle at
I mentioned that theorem
ok thanks kajal i understand
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ok
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