Question

(3) If s=1/2(a+b+c), finds when a=6,b=7,c=13
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Answer 1

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Answer 2

Step-by-step explanation:

$s = \frac{1}{2}( a + b + c) \\ \\ a = 6 \: \: \: \: \: \: b = 7 \: \: \: \: \: c = 13 \\ \\ (a + b + c) =( 6 + 7 + 13) \\ \\ \: \: = 26 \\ \\ s = \frac{1}{2} \times 26 \\ \\ \: \: = 13$