# 8.4.2. Isosceles Triangles

In the figure below,

- A
- B
- C
- D

### Example

In the figure below,

### Solution

Step 1: Determine

Therefore,

Write an equation to show that the sum of

Therefore,

Step 2: Determine

Step 3: Determine

Write an equation to show that the sum of

Therefore,

Step 4: Determine