Question

a chord of length 30cm is drawn at a distance of 8 cm from the centre of the circle.find the radius of a circle

Answer 1

The radius of the given circle is 17 cm

Answer 2

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