The length of the tangent drawn to a circle with radius 7 cm from a point 25 cm away from the centre is = ___ cm.
∠ABO= 90∘ (point of contact)
Using Pythagoras theorem
AO2= AB2+ BO2
252= AB2+ 72
252 - 72 = AB2
24= AB
length of the tangent = 24 cm
A point P is 25 cm from the centre of a circle. The radius of the circle is 7 cm and length of the tangent drawn from P to the circle is x cm. The value of x is ___ cm.
The length of the tangent drawn from a point 8 cm away from the centre of a circle of radius 6 cm is