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As per your syllabus, given a triangle with sides a, b, c — what is the SEMI-PERIMETER s used in Heron's formula?

As = (a² + b² + c²) / 2
Bs = (a + b + c) / 2
Cs = (abc) / 3
Ds = (a + b + c)
Answer & Solution
Correct answer: B. s = (a + b + c) / 2
Semi-perimeter = half the perimeter = (a+b+c)/2. The other options misstate.
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