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3.1 Geo Parallel, Perpendicular, and Skew Lines
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Gravity
Terms in this set (25)
never
Two skew lines are ____________ parallel
always
Two parallel lines are __________ coplanar
Sometimes
A line in the plane of the ceiling and line in the plane of the floor are ____________ parallel
never
Two lines in the plane of the floor are ___________ skew
TERM
sometimes
If a line is parallel to a given plane, another plane containing that line is _____________ parallel to the first one
sometimes
Two lines parallel to the same plane are ___________ parallel to each other
always
Two lines parallel to a third line are ______________ parallel to each other
sometimes
Two lines parallel to the same line are ____________ parallel to each other
sometimes
When there is a transversal of two lines, the 3 lines are _______________ coplanar
never
Skew lines are ___________ coplanar
Always
Two planes parallel to the same plane are ______________ parallel to each other
Always
Two lines skew to a third line are _____________ parallel to each other
Sometimes
Sometimes Two lines perpendicular to a third line are __________ parallel to each other
Never
Through a point outside a plane, there is _________________ only one line parallel to the plane
Sometimes
If a line intersects one of two parallel lines, then it __________ intersects the other parallel line
Never
(Intersecting lines cannot be skew)
If each of three intersecting lines is skew to a fourth line, then the three lines are ____________ coplanar
Sometimes
Sometimes If two lines are parallel to a plane, then the two lines are _________ perpendicular to each other
Sometimes
Sometimes If two planes are perpendicular to a third plane, then the two planes are ____________ perpendicular to each other
Never
(there are infinite lines in a plane, so one line cannot touch them all)
If a line is perpendicular to a plane, then it is ___________ perpendicular to every line in the plane
Sometimes
If two lines are perpendicular to a third line, then the two lines are ____________ parallel to each other
Planes
Flat surfaces with infinite lines making them up, pointing in all directions
Intersecting and Parallel Lines
Only occur on flat surfaces (planes), that are coplanar
Skew Lines
Non-coplanar, can't be parallel (only possible in 3-D)
coplanar
Points or lines that all lie in the same plane.
colinear
three or more points that lie on the same line
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