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Find the area of the triangle with verti...

Find the area of the triangle with vertices A(1,1,2)B(2,3,5) and C(1,5,5).

Text Solution

Verified by Experts

The correct Answer is:
NA

From the figure,
Slope of `BE,m_(BE)=(b)/(a)`
Slope of `AD,m_(AD)=-(2b)/(a)`
Given that AD and BE are perpendicular.
`therefore m_(BE)xxm_(AD)=-(2b^2)/(a^2)=-1`
`rArra^2=2b^2`
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