Geometry Vocab Chapter 1 - LHS

Point

The most basic building block, has no size, has only a location represented by a dot and named with a capital letter

How many dimensions is in a point?

zero

Point

The most basic building block, has no size, has only a location represented by a dot and named with a capital letter

How many dimensions is in a point?

zero

Line

a straight continuous arrangement of infinitely many points, infinite length, no thickness

How is a line named?

A line is named by giving the letter names of any 2 points on the line and placing a line symbol over the letters

How many dimensions is a line?

One

What does a line must have?

Arrows

Plane

length & width but no thickness, a flat surface that extends infinitely along its length and width

How is a plane named?

A plane is named with a script capital letter or with any 3 points on the plane & represented with a 4-sided figure

How many dimensions is a plane?

2

What are the undefined terms in Geometry?

points, lines and planes

Collinear Points

points on the same line

Coplanar Points

points on the same plane

Noncollinear

points that do no lie on the same line

segment

Consists of two points called the endpoints of the segment and all points between the endpoints

Noncoplanar points

Points that do not lie on the same plane

Can you measure a line?

No because they’re is no start or stop

Congruent segments

Two segments that have the same measure or length

space

the set of all points

An example of congruency marks

Example 30FG

Why can’t a line have a mid point

No end points

Bisects

To divide the segment into two congruent segments

Ray

Begins at a point and extends in 1 direction

A ray is directional, we name a ray with first its ____ and secondly the point that is passes through

endpoint

How many dimensions is space

3

Midpoints can be found on _____________

segments

Segment Bisector

When a line, ray, or segment intersects a segment at the midpoint