In a triangle ABC, if the median and altitude from A trisect angle A, then `(B-C)` is (in degrees) equal to………. a) 0 degree b) 30 degree c) 60 degree d) 90 degree

Options

A. 0 degree
B. 30 degree
C. 60 degree
D. 90 degree

Explanation

To solve the problem, we need to analyze the triangle ABC where the median and altitude from vertex A trisect angle A. Let's denote the angles as follows:

- Let angle A = 3A (since it is trisected into three equal parts).
- Therefore, angle BAD = angle DAM = angle MAC = A.

### Step-by-Step Solution:

1. **Construct Triangle ABC**:
...