thanks in advance
CB=CE .thats what i understand .the rest i leave to wenshih or eagle to explain
use similar triangles? there are alot of similar triangles in this diagram.
i got AC = 13.5, waiting for eagle or wenshih to confirm my answer.
First determine that angle BED = angle BDE = angle CBA = angle ACB
means tt angle EBD = angle ECB = angle BAC (isosceles triangle mah)
so using BC = 9, CE = 9 also, so DE = 4.
let BE = x, then we have
x / 4 = 9 / x
x = 6
similarly,
x / 9 = 9/ AC
since x = 6
AC = 13.5
SBS261P, you are good!
thanks all