Question

If AB = 15 then what is DE? (picture to be included)

Answer 1

first find CB

Answer 2

AB=15cm
CB=15-8=7cm
then use this formula
AC*CB=CD*CE

Answer 3

which is 15-8 so CB=7

next, you find CE using the two chord theorem
which states
AC * CB= DC * CE
let CE=x

so 8*7=4x

once you find x add 4 to it to find DE

Answer 4

AC*CB=CD*CE
8*7=4*CE
CE=14
ED=14+4=18

Answer 5

thank you both!

Answer 6

no problem