Lesson 1.1-1.5 Flashcards
Location in space, no dimension, dot, name: capital letter
Point
Series of points in opposite direction without end, 1-D, straight, name: 2 pts./ cursive lowercase letter
Line
Flat surface forever, 2-D, inf. pts and lines, 4 sided figure, name: three noncollinear pts. on plane/ cap cursive letter
Plane
pts. that can lie on same plane
Collinear Pts.
pts. not all on same line
Non-collinear Pts.
pts. that lie on same plane
Coplanar pts
measurement should be precise to within .5 unit of measure
precision
pts that DONT lie on same plane
non coplnar pts
set of all pts in 3-D
space
part of line w/ 2 end pts
segment
(seg addition postulate) collinear pts, AB+BC=AC add up betweeness
b/wness of pts
middle b/w pts, congruent
midpoint
part of line, one end pt other extend inf,
ray
2 rays w/ common end pt that go in opp direction
opposite rays
formed by 2 noncollinear rays that have common vertex,
angle
sides of angle are _____ that form it
rays
divides a plane into 3 distinct parts (exterior and interior)
angle
measures only 0-90 degrees b/w
acute angle
measures exsctly 90 degrees
right angle
measures 90-180 b/w
obtuse angle
have same measure
congruent angle
pair of angles in same plane, same vertex, a same side, no common interior pt
adjacent angle
2 angles w/ measures that have a sum of 90
complementary angles
2 angles w/ measures that equal 180
supplementarhy
adjacent angles w/ non common saides that are opp rays(180 line)
linear pair of angles
2 non adjacent angles formed by 2 itersecting lines, these angles are congruent
verticle angle
lines/rays/segments that form a right angle
perdendicular lines
any three non collinear points can name a _____
plane
a ____ has neither shape or size
point
