Question

Using the diagram below, calculate the length of BO.

A. 25 in
B. 4 in
C. 7 in
D. 5 in

Answer 1

D

Answer 2

you need to use pythagoras' theorem.

The line from the centre of the circle bisects the chord, so the length of DB = 4 and the length DO = 3

so using the theorem

\[OB^@ = OD^2 + DB^2\]

that should help

Answer 3

thanks (: