tangents of a length 5 cm is draw to a circle from a point 4 cm away from the centre of a circle find the radius
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As tangent is always perpendicular to radius Therefore, Just use Pythagoras theorem
5^2 = 4^2 + r^2
25 - 16 = r^2
9 = r^2
3 = r
Therefore, the radius of circle is 3 cm
5^2 = 4^2 + r^2
25 - 16 = r^2
9 = r^2
3 = r
Therefore, the radius of circle is 3 cm
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