In a triangle a = 13 , b = 14, c = 15, r =

Options

A. 4
B. 8
C. 2
D. 6

Explanation

To find the radius \( r \) of the incircle of a triangle with sides \( a = 13 \), \( b = 14 \), and \( c = 15 \), we can follow these steps:

### Step 1: Calculate the semi-perimeter \( s \)
The semi-perimeter \( s \) of a triangle is given by the formula:
\[ s = \frac{a + b + c}{2} \]
Substituting the values of \( a \), \( b \), and \( c \):
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