Determine the line of symmetry of a triangle ABC in which `/_A=70^(@)` and `/_B= /_ C =55^(@)`.

Explanation

To determine the line of symmetry of triangle ABC where angle A = 70° and angles B and C = 55°, follow these steps:

### Step-by-Step Solution:

1. **Identify the Angles of the Triangle**:
- Given: Angle A = 70°, Angle B = 55°, Angle C = 55°.
- Since angles B and C are equal, triangle ABC is an isosceles triangle.

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