What is the area of the triangle? 9 4 12

 13.636

Step-by-step explanation:

The area can be found using Heron's formula:

A = √(s(s-a)(s-b)(s-c))

where s=(a+b+c)/2.

For the given triangle,

a=9, b=4, c=12, s=(9+4+12)/2 = 12.5

 A = √(12.5(3.5)(8.5)(0.5)) = √185.9375 ≈ 13.636

The area of the triangle is about 13.636 square units.

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