Find the area of the triangle with vertices: Q(-5,2,-1), R(-8,-1,2), S(-7,4,3).
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Step 1
To find the vector QR, we subtract the coordinates of point Q from the coordinates of point R: QR = R - Q = (-8, -1, 2) - (-5, 2, -1) = (-8 + 5, -1 - 2, 2 - (-1)) = (-3, -3, 3). To find the vector QS, we subtract the coordinates of point Q from the coordinates Show more…
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