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Answer:
the length of the radius is 9cm
as ∆OAB is an right angled triangle
taken OA a perpendicular,OB as hypotenuse and AB as base
solved by Pythagoras theorem
let OA be x
12²+x² = 15²
225-144 =81
✓81 =9
Step-by-step explanation:
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Answer:
9cm
Step-by-step explanation:
Using Pythagoras
15^2=12^2+OA^2
225=144+OA^2
225 - 144 = OA^2
√81 = OA
9cm = OA(radius)