Question

4. Calculate the length of tangent from a point 15 cm. away from the centre of a circle of
radius 9 cm.​

Answer 1

Answer:

let the length of tangent be x cm given that r=9and hypotenuse =15 so using Pythagoras theorem PA^2=PB^2+PQ^2

PQ^2=PA^2-PB^2

15^2-9^2

225-81=144

PB^2=144PB=√144

SO PB=12