Determine whether the triangle whose lengths of sides are `3 cm, 4 cm, 5 cm` is a right-angled triangle.

Explanation

To determine whether the triangle with sides of lengths 3 cm, 4 cm, and 5 cm is a right-angled triangle, we can use the Pythagorean theorem. The theorem states that in a right-angled triangle, the square of the length of the hypotenuse (the longest side) is equal to the sum of the squares of the lengths of the other two sides.

### Step-by-Step Solution:

1. **Identify the sides of the triangle**:
The given sides are 3 cm, 4 cm, and 5 cm. Here, the longest side is 5 cm.

2. **Apply the Pythagorean theorem**:
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