Geometry

Question Analysis

Since the lengths of all three sides of  (, , ) are known, the key is to use Heron's formula to calculate the area.

Key Concept Explanation

Heron's Formula: For a triangle with side lengths , , , the area , where  (semi - perimeter). It provides a way to find the area when the side lengths are given.

Step - by - Step Solution

1. Calculate the semi - perimeter :

Let , , . Then

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