vocab unit one? Flashcards
(44 cards)
no dimension
represented by a dot with capital letter
point
point line plane
undefined term
1 dimension
represented by a line with two arrows on each end
line
2 dimensions
represented by a shape that looks like a floor/wall and named using three non-collinear points
plane
points on same line
collinear points
points on same plane
coplanar
terms that can be described using known words
undefined terms
consists of two end points
must be straight
line segment
consists of one end point and an extending line in the opposite direction
ray
collinear
same end point but move in opposite directions
opposite rays
set of points the figures have in common
intersection
a rule accepted without proof
used to prove theorems
postulate
same as postulate
axiom
can be mathematically proven
theorem
actual location of number
coordinate
always positive
talked about in terms of absolute value
distance
equal measure
equal sign with squiggle on top
congruent
point that divides a segment into two congruent segments (not line)
midpoint
distance formula
sqrt (x sub1 - x sub2)^2 + (y sub1 - y sub2)^2
midpoint formula
(x sub1 + x sub2)/2 , (y sub1 + y sub2)/2
consists of two different rays with the same end point
angle
made up by the rays
side of angle
the endpoint of the two rays
vertex
measure of an angle
always positive