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Point
A point is an exact location in space.

Line
A line is a strait path that extends without end in both/opposite directions

Ray
A ray is a part of a line that has an end point and extends without ending in the opposite/one direction.

Line Segment
A line segment is part of a line or ray that extends from one end point to another.

Plane
A plane is a perfectly flat surface that extend infinitely on all directions.

Congruent
Congruent is if they have the same shape and size.

Angle
An angle is formed by two rays with a common endpoint

Vertex
The common end point is the vertex

Right angle
A right angle is an angle that measures exactly 90*

Acute angle
An acute angle is an angle that measures less than 90*

Obtuse angle
An obtuse angle is an angle that measures more than 90* but less than 180*

Strait angle
A strait is an angle that measures exactly 180*

Complementary angles
If the sum of the 2 angles is 90* than the angles are complementary

Supplementary angles
If the sum of the 2 angles are 180* than the angles are supplementry

Perpendicular lines
Are 2 lines that intersect forming a 90* angle

Parallel lines
Some lines in the same plane that do intersect at all

Skew lines
Do not intersect and yet they they are also not parallel

Vertical angles
R the opposite angles formed by 2 intersecting lines

Transversal
Is a line that intersects 2 or more lines 8 angles are formed

Circle
Is a set of all points in a plane that are the same distance from a givin point

Center of circle
The given point on a circle is the center of the circle

Arc
Part of a circle named by its endpoints

Radius
Line segment whose endpoints are the center of the circle

Diameter
Line segment that passes through the center of the circle

Chord
Line segment whose endpoints are any 2 on the circle

Central angle
 Of a circle is an angle formed
 By 2 radii

Sector
Part of circle enclosed by 2 radii


