the length of the tangent from a point A at a distance 70 cm. from the centre of a circle is 56 cm. Find the circumference of the circle.
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Name the point as B where he tangent touches the circle and take O as the center.
Now BOA is a right angled triangle with angle OBA = 90 degrees.
Therefore, by using Pythagoras theorem, we can find OB and we get OB = 42cm.
Now using the formula of finding the circumference,i.e 2(pi)r, we get the circumference as 264cm.
Now BOA is a right angled triangle with angle OBA = 90 degrees.
Therefore, by using Pythagoras theorem, we can find OB and we get OB = 42cm.
Now using the formula of finding the circumference,i.e 2(pi)r, we get the circumference as 264cm.
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