## Write a Python program using functions to calculate area of a triangle after obtaining its three sides.

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Answer:
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```
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import math
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def
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triangle_area
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(a,b,c):
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s=(a+b+c)/
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2
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ar=math.sqrt(s*(s-a)*(s-b)*(s-c))
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return ar
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a=float(input(
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"Enter first side of the triangle: "
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))
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b=float(input(
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"Enter second side of the triangle: "
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))
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c=float(input(
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"Enter third side of the triangle: "
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))
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area=triangle_area(a,b,c)
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```

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print("The area of a triangle with sides ",a,", ",b,", ",c," is ",area)
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