Question

a chord of a circle is 30 cm long its distance from the centre is 8 cm find the radius of the circle​

Answer 1

Answer:

the chord will be perpendiculars it will form right angled triangle  :

so r^2= {cord/2}^2 + {distance}^2

=> r^2= {15}^2 + {8}^2

=>r^2= 225 + 64

=>r^2=289

=>r=17

Answer 2

Answer:

Step-by-step explanation:

given a chord length=30cm

distance of it from the center is 8cm

radius^2=(half of chord length)^2+(distance from the center^2)

r^2=15^2+8^2=225+64=289

r=17