A triangle and a parallelogram have the same base and the same area. If the sides of the triangle are `26 cm, 28 cm` and `30 cm,` and the parallelogram stands on the base `28 cm,` find the height of the parallelogram.

Explanation

To solve the problem, we need to find the height of the parallelogram given that it has the same area as the triangle with sides 26 cm, 28 cm, and 30 cm, and that the base of the parallelogram is 28 cm.

### Step-by-Step Solution:

1. **Calculate the semi-perimeter (s) of the triangle:**
The semi-perimeter \( s \) is given by the formula:
\[
s = \frac{a + b + c}{2}
...