Question

AT is a tangent to a circle with centre O at A. AT=12cm,OT=13cm find the diameter of the circle
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Answer 1

Answer:

10

Step-by-step explanation:

OT will be hypotenuse

so OT^2 = AT^2 +OA^2

13^2= 12^2+OA^2

OA^2= 169-144=25

OA =5

so diameter = 2*OA = 2*5=10