Description

Explanation & Answer

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1/AB=square root (4-2)^2+(-2-1)^2+(6-4)^2=square root 6
AB=2.45
BC=squareroot (4-5)^2+(-2-0)^2
=squareoot 21
1/2ABsinC
b^2=a^2+c^2-2acCos a
ANS =3.354 units squared
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