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geometry
point, lines, and planes
50
Mathematics
9th Grade
07/24/2012

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Cards

Term
point
Definition
a location
Term
line
Definition
two dimensional, is never ending, must have two points
Term
ray
Definition
continues forever in only one direction instead of both directions like a line
Term
plane
Definition
two dimensional, goes on forever, made of infinite lines, made up of three points, needs three points to exist
Term
space
Definition
all points/all locations
Term
collinear
Definition
points that are together on a line
Term
coplanor
Definition
together on the same plane
Term
angle
Definition
where two rays meet
Term
acute
Definition
less than 90 degrees
Term
right
Definition
exactly 90 degrees
Term
obtuse
Definition
larger than 90 degrees but less than 180 degrees
Term
straight
Definition
exactly 180 degrees
Term
complentary
Definition
when angles add to make 90 degrees
Term
supplementary
Definition
when angles add to make 180 degrees
Term
vertical
Definition
vertical angles are oppisite angles when two lines cross
Term
congruent
Definition
two angles the same or equal to
Term
bisector
Definition
two equal sections; cuts in half
Term
parallel lines
Definition
two lines that never intersect on the same plane(same slope)
Term
parallel planes
Definition
never intersect & go in the same direction
Term
skew lines
Definition
never intersect & go in difrent directions
Term
perpendicular
Definition
cross to make 90 degrees
Term
transversal
Definition
line that crosses through
Term
conditional
Definition
Term
hypothesis
Definition
Term
conclusion
Definition
Term
converse
Definition
Term
counterexample
Definition
Term
inverse
Definition
Term
contrapositive
Definition
Term
biconditional
Definition
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