find the area of triangle two sides which are 16cm and 12 cm and the perimeter is 42cm.
plzzzz guys answer quickly
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Step-by-step explanation:
let the one side be x
=42=16+12+x
=x=14
=s=1/2×42=21
area=,√s(s-a) (s-b) (s-c)
=√21(21-16)(21-12)(21-14)
=√21(5)(9)(7)
=21×15×3×3×7
=21×21×15
=21√15
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