unit 1.
Point
A location, labeled with capital letters
Segment
Extends infinitely in no direction, from point to point
Side (of an angle)
A position to the left or the right of an object place or central point
Conplemertary angles and supplementary angles
Complementary Angles- add up to 90 degrees
Supplementary Angles- add up to 180
Midpoint
The exact middle point
Line
Any two points, extends infinitely in both directions
Endpoint
The place where a ray starts or ends or a segment
Intersection (intersecting lines and intersecting planes)
Intersection- a point or line common to lines or surfaces that intersect
Linear pair
Two angles that put together form a line
What is an inscribed circle? What is a circumscribed circle?
Inscribed Circle- the largest circle contained within the triangle
Circumscribed Circle- a drawn circle that goes around an angle/ triangle/ any shape
Plane
Flat surface that extends infinitely
Ray
Starts at one point and extends infinitely in one direction
Congruent
Having the same size and shape
Right angle, acute angle, and obtuse angle
Right Angle- angle that is 90 degrees
Acute Angle- and angle that is less than 90 degrees
Obtuse Angle- an angle that is more than 90 degrees
What is a vertical angles?
two strait lines intercescting and the two angles on each side match
Collinear
When multiple points are in a strait/same line
Angle
The space between two intersecting lines
Length
The measurement or extent of something from end to end
Parallel and perpendicular lines
Parallel Lines- infinite copliner lines that do not intersect at any point
Perpendicular Lines- two geometric objects are perpendicular if their intersection forms right angles at the point of intersection
What are adjacent angles?
Angles that meet at a point and the two angles are beside each other
Coplanar
In the same plane
Vertex
Point where everything starts
Angle measure
The space between two intersecting lines
What is a bisector? What is a segment bisector? What is a perpendicular bisector? What is an angle bisector?
Bisector- something that splits something into two parts
Segment Bisector- the devision of something into two equal or congruent parts
Perpendicular Bisector- a line that bisects another line segment at a right angle
Angle Bisector- a line that splits an angle into two equal parts
What is a reflex angle? What is a strait angle?
Reflex- and angle that is more than 180 and less than 360
Strait- and angle that is equal to 180 degrees