Question

What is AC? pls help 30 points if u awnser

Answer 1

I’ve done this, the answer was c

Answer 2

C. 6

Explanation:

ΔADC and ΔACB are similar because two of their angles are congruent (∠ACD and ∠ABC, and ∠DAC and ∠CAB)

Because the sides are similar, you can create a proportion

`(AC)/(AD)=(AB)/(AC)`

substitute the given values for the sides. AD=4 and AB=4+5=9

`(AC)/(4)=(9)/(AC)`

cross multiply

`AC^(2) =36`

take the square root of both sides

AC=6