Answer:
W
Step-by-step explanation:
W is the vertex, you can see the letter above the angle
1. Is correct
2. x^2 - 12
3. 2 / (a-1)
A. You would be able to prove it by SSS. One side is already said to be congruent and the other is shared by both.
Given that the triangle is isosceles, we can say that AB = AC. Using the given expressions we can form the following equation.

Let's solve for x.

Once we have the value of the variable, we can find the length of AC.

<h2>Therefore, the length of AC is 43.</h2>