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a point is a ______
size and shape/ capital letter
Points have no what and what? And we always use a what?
line
is made of two or more points (has no thickness or width)
with any two points on the line, or a lowercase script letter
How do you name a line?
collinear points
points that lie on the same line
Noncollinear points
Points that do not lie on the same line (must be at least 3 points)
plane
a flat surface made up of points (any 3 points makes it) and it extends indefinitely
with any three non-collinear points on the plane or an uppercase script letter
How do you name a plane?
coplanar points
points that lie on the same plane
non-coplanar points
points that do not lie on the same plane
point
two lines intersect at a ____
line
two planes intersect at a ____
the length of AB or AB
the distance between two points A and B be written as _____ or ____ (segments have a line above it when named/written)
congruent
if AB=CD then the segments are___ (check papers to see how it is written)
-the same size
IMPO TIP
equal signs are for equal numbers
AB+BC=AC
If A, B, and C, are collinear pints and B is between A and C then
midpoint of a segment
is the point that divides the segment into two congruent segments
segment bisector
a segment, ray, line, or plane that intersects a segment at its midpoint
rays
an angle is formed by two ____ with a common endpoint
vertex
The common endpoint of an angle
sides
the rays of an angle
3 letters
Name an angle using what? The middle letter must always represent the vertex.
acute
less than 90 degrees
obtuse
greater than 90 degrees
right
equal to 90 degrees
straight
180 degrees
angle bisector
a ray that divides an angle into two congruent angles
perpendicular lines
Lines that intersect to form right angles (90 degrees)
upside down T
the symbol for perpendicular lines
perpendicular bisector
a segment, ray, line, or plane that is perpendicular to a segment at its midpoint
Note
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