Question

The radius of circle O is 18, and OC = 13. Find AB. Round to the nearest tenth, if necessary. (The figure is not drawn to scale.)


A. 12.4

B. 3.8

C. 24.9

D. 44.4

Answer 1

i think u have to find the length of BC, first
use pythagorean theorem

Answer 2

okay , but since i only know one side how do i do it ?

Answer 3

BC^2 = BO^2 - CO^2
BC^2 = 18^2 - 13^2
BC^2 = 31 * 5
BC^2 = 155
BC = sqrt(155) = ....

Answer 4

okay , so lengths 12 and 13?

Answer 5

what do u meant 12 and 13 ? what's lengths are

Answer 6

the sides i need to use for the pythagorean theorem

Answer 7

ohhh... 13 and 18 are the numbers on the right triangle

Answer 8

nevermind , i believe the answer is C because BC is 12 and so C to A would be 12 as well :)

Answer 9

well it was actually 12.4 so 12.4 + 12.4 is 24.8 which is pretty close.

Answer 10

AB = 2 * BC = 2 * sqrt(155) = 2 * 12.45 = 24.9
yeah, u are right :)

Answer 11

yayy! thanks for your help ! =)

Answer 12

welcome