Question

plss tell answer and read carefully pls

Answer 1

Answer

13.3

Explanation

In triangle ABC

AC^2= (AB)^2 + (BC)^2

AC^2 = (4)^2 + (3)^3

AC^2 = 16 + 9

AC =

$\sqrt{25}$

AC = 5

NOW ,

IN TRIANGLE CAD

DC^2 = (AD)^2 + (AC)^2

DC^2 = (12)^2 + (5)^2

DC^2 = 144 + 25

DC^2 = 179

Therefore,

DC =

$\sqrt{179}$

so,

DC = 13.3