Points Lines Planes
Circles PolygonsCongruency
Similarity
Point• A position in space, has no size only location
•D •B •N
D, B and N represent points
Line• Continues without end in opposite directions
• •
A B
AB represents a line
Segment• Part of a line made up of 2 points and all the
points of the line between the 2 points
• •
D E
DE represents a segment
Ray• Part of a line consisting of one endpoint and
all the points of the line on one side of the endpoint
F G
FG represents a ray
• •
What are parallel lines?
• Parallel lines are lines that never intersect.
What are intersecting lines?
• Lines that cross at any point are intersecting lines.
What are perpendicular lines?
• Two lines that cross to form a right angle are intersecting lines.
Points and Lines in Real World
VERTEX• A VERTEX is a fancy name for “angle”
• Two rays or lines that have the same endpoint make a VERTEX/angle
• VERTEX/angles are measured in “degrees”
The Corners of a square are its vertex/angles
When two lines cross, they make vertex/angl
es
CONGRUENT• CONGRUENT means the “same”
• CONGRUENT LINE SEGMENTS means two line segments are the same
• CONGRUENT Vertex/Angles means two angles are the same
● ●
● ●
The Hershey & Crunch Bar are a Congruent size
Open your etextbook on page 33.
Top Related