Find the area of a triangle `ABC` whose sides are `9m ,12 m a n d15 m` respectively.

Explanation

To find the area of triangle ABC with sides measuring 9 m, 12 m, and 15 m, we will use Heron's formula. Here’s the step-by-step solution:

### Step 1: Identify the sides of the triangle
Let:
- Side A = 15 m
- Side B = 12 m
- Side C = 9 m

...