Question

PT is a tangent to circle whose centre is O if PT is equal to units and radius is r units then how far are from O
A)√a²+r²
B)√a²-r²
C)√r²-a²
D)√2x​

Answer 1

Answer:

Step-by-step explanation:

Given PT=30cm

OT is the radius of a cicle  

therefore OT will be half of given diameter  

OT = 16cm  

∠OTP = 90  

∘

  (tangent is perpendicular to radius at point of contact)

now apply pythogoras theorem to  

→$OP^{2} = OT^{2}+TP^{2} OP^{2} = 16^{2} + 30^{2} OP = 34$