geometry 1

what are the undefined terms?

point, line, plane

can a line be named by any of it’s points?

yes

what is a line segment?

line with two endpoints

how do you notate a line segment?

using only it’s endpoints

can a line segment have multiple internal points?

yes

what is a ray?

one endpoint and an infinite direction

how do you notate a ray?

listing the endpoint first

what does collinear mean?

points lying on the same plane

what does perpendicular mean?

two lines intersect to form a 90 degree angle

what are adjacent angles?

two angles that share a vertex and a common side but don’t overlap

what are linear angles?

two adjacent angles that share a common side and their non-common side forms a straight line

what are vertical angles?

angles formed when two lines intersect

what makes angles complementary?

they add to 90 degrees

what makes angles supplementary?

they add to 180