Question

The length of the chord of a circle is 8 cm and
perpendicular distance between centre and the
chord is 3 cm. Then, the radius of the circle is
equal to
(a) 4 cm (b) 5 cm (c) 6 cm (d) 8 cm​

Answer 1

Answer:

Option(b)

Step-by-step explanation:

AC = CB = 4 cm

OC = 3 cm

∴ OA = √OC² + CA²

=> √3² + 4²

=> √9 + 16

=> √25

=> 5 cm

Therefore,

Radius = 5 cm

Hope it helps!

Answer 2

Answer:

Step-by-step explanation:

Join AC

By Pythagoras

Bc^2+AB^2=AC^2

4^2+3^2=AC^2

16+9=√25

=5