Geometry

Question Analysis:
This question involves isosceles triangle properties and triangle congruency.
The main focus is on using equal sides property to determine the missing length.

Key Concept Explanation:
In an isosceles triangle, the two equal sides determine the triangle’s structure.
The base is bisected by the perpendicular height from the vertex.

Step-by-Step Solution:
Since AB = AC, and AB = 8, we conclude that AC = x = 8.

Common Mistakes:
Assuming the unknown side is different from the given equal side.
Not recognizing that the two sides...