Plane rotated through a right angle about its line of intersection with another plane

1. A.
   $(2, - 2,0)$
2. B.
   $( - 2,2,0)$
3. C.
   $(1,0,2)$
4. D.
   $( - 1,0, - 2)$

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1. A.
   $\frac{a}{8} = \frac{b}{5} = \frac{c}{- 4}$
2. B.
   $\frac{a}{4} = \frac{b}{5} = \frac{c}{- 2}$
3. C.
   $\frac{a}{8} = \frac{b}{- 5} = \frac{c}{4}$
4. D.
   $\frac{a}{4} = \frac{b}{5} = \frac{c}{2}$

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1. A.
   90
2. B.
   85
3. C.
   105
4. D.
   126

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