Find the length of tangent in a circle with radius 7cm from a point 25cm away from the centre
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Apply pythagoras theorem, since tangent is perpendicular to line joining center and point where tangent touches circle.
Let y be length of tangent
y^2 = 25^2-7^2
y = 24cm
Let y be length of tangent
y^2 = 25^2-7^2
y = 24cm
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