Question

the lenght of the tangent draw to a circle radius 5 cm is 12 cm then external point to 5he centre of the circle​

Answer 1

Answer:

It is given that the tangent of circle is 12 cm and distance of Q from the centre is 13 cm.

Since the radius OT is perpendicular to QT, therefore,

OT2=OQ2−QT2

⇒OT2=132−122

⇒OT2=169−144

⇒OT2=25

   ⇒OT=25

   ⇒OT=5cm

Answer 2

Answer:

Let AP be a tangent drawn from P to a circle with centre O such that AP = 24 cm and OB = 25 cm.

In right angled △ OAB,

OP↑2 =OA↑2+AP↑2

25↑2 =OA↑2+24↑2

OA↑2 =49

OA=7 cm

Hence, the radius of circle is 7 cm.

Step-by-step explanation:

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