Respuesta :

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Answer:

AC = 20

Step-by-step explanation:

Calculate the length of AB:

rise: 9-3=6

run: 8-0=8

use Pythagoras theorem:

length^2=rise^2 + run^2

length =√36+64

length = 10

since B is the midpoint of AC, AB = BC

length of AC = 10*2 = 20