Geometry 1
A flat surface that extends infinitely in all directions and has no thickness.
Plane
Points that do not lie on the same line
Noncollinear points
Two Lines that cross each other at one point
Intersecting Lines
An angle formed by two chords in a circle that meet at a point on the circle.
Inscribed Angle
A set of all points in a plane that are the same distance from a fixed point called the center.
Circle
Points that lie on the same straight line
Collinear Points
Points that do not lie on the same plane
Noncoplanar points
Lines that intersect and forms a 90 degree angle
Perpendicular Lines
An angle whose vertex is the center of the circle and whose sides go to two points on the circle.
Central Angle
All the points inside the circle, not including the circle itself.
Interior of a Circle
A location in space that has no size, shape, or dimension
Point
It starts at one point and extends endlessly in one direction
Ray
Three or more lines that intersect at the same point
Concurrent Lines
An arc that is exactly half of the circle (180°), formed when the endpoints of the arc are the endpoints of a diameter
Semicircle
All the points outside the circle
Exterior of a Circle
A straight path that extends forever in both directions and has no thickness.
Line
It has two endpoints
Line segment
The point that is exactly halfway between the two points
Midpoint
An arc that is more than half the circle
Major Arc
A line segment from the center of the circle to any point on the circle.
Radius
Points that lie on the same plane.
Coplanar Points:
Lines that never intersect
Parallel Lines
A line, ray, or segment that cuts another segment into two equal parts
Segment bisector
An arc that is less than half the circle
Minor Arc
A line segment that connects two points on the circle without necessarily passing through the center.
Chord