theman4 theman4

14-07-2016
Mathematics

Answered

Can someone please answer. There is one problem. Thank you!

Can someone please answer. There is one problem. Thank you! class=

Verified Answer :

14-07-2016

Hello,

if we use Heron's formula:

p=(7.2+5.9+11.2)/2=12.15

Area=√(p(p-a)(p-b)(p-c))
=√(12.15(12.15-7.2)(12.15-5.9)(12.15-11.2))
=√357,09609375
=18,896986366878714557972599553433≈18.90

So i suppose Answer=D (with an error of 0.01)

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