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.