Question

o is the center of the circle and D is the midpoint of chord AB angle OBD equal to 30degree and the radius of the circle is 8cm find od​

Answer 1

the the length of OD is 4 cm.

because, in triangle ODB,

we we have to find OD and OB is the radius radius of circle 8 cm.

so so we will use sin theta

A/Q

sin°= perpendicular/ hypotenuse

= OD/OB

sin 30°= OD / 8

1/2 = OD/ 8

OD= 8/2

OD= 4

therefore, OD is 4 cm.