If distinct planes r and s are both perpendicular to line l , which is always true?
1. plane...
Mathematics, 03.01.2020 21:31 valdezangie10
If distinct planes r and s are both perpendicular to line l , which is always true?
1. plane r is parallel to plane s
2. plane r is perpendicular to plane s
3. planes r and s and line l are all parallel
4. the intersection of planes r and s is perpendicular to line l
Answers: 3
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