Explanation:
semi perimeter(s) = (30+40+50)/2
= 60
a=30 b=40 c=50
area = √s(s-a)(s-b)(s-c)
= √60(60-30)(60-40)(60-50)
= √60×30×20×10
=√360000
=600
Answer:
1/2 base x height
(40 divided by 2) x 30 =600m^2
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