The sides of a triangle are 5 cm, 8 cm and 11 cm respectively. Demtermine whether it is a right angled triangle or not.

Explanation

To determine whether the triangle with sides 5 cm, 8 cm, and 11 cm is a right-angled triangle, we can use the Pythagorean theorem. According to the theorem, 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 sides given are 5 cm, 8 cm, and 11 cm.
- Here, the longest side is 11 cm.

2. **Apply the Pythagorean theorem**: According to the theorem, for a triangle to be right-angled, the following equation must hold true:
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