Question

O is centre of the circle.Find the length of radius, if the chord of length 24 cm is at a distance of 9 cm from the centre of the circle

Answer 1

P =9cm

b = 24/2 =12 cm

hypotenuse= radius

by Pythagoras theorem,

h^2 = 81+144

h^2 = 225

h= 15

Answer 2

if length of the chord is 24 then the point

from perpendicular distance of 9 cm is 12 cm

then on right angle triangle

radius^2=12^2+9^2

r^2=144+81

r^2=225

r= 15

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