Question

for rectangle ABCD, if AB=14 and EB=10, then what is the measure of AC?

Answer 1

do you have a diagram, just want know where the position of point E ?

Answer 2

look at number 14 on the pic i just sent

Answer 3

nah, that make sense now.
obvious, the diagonals of a rectangle always be same, so AC = BD. while BD = 2 * EB = 2 * 5 = 10.
therefore AC = 10