Geometry Chapter 1 Vocab

Question 1

Segment

Answer 1

A finite section of line; The space between 2 endpoints

Question 2

Between

Answer 2

On the line segment

Question 3

Intersection

Answer 3

The common points; A point or set of points in both figures

Question 4

Segment Addition Postulate

Answer 4

If B is between A and C, the AB+BC=AC

Question 5

Ray

Answer 5

Consists of 1 endpoint (A) and all points that are on the same side of (A) as the other point (C). The endpoint is the 1st point named

Question 6

Congruent

Answer 6

Same shape; same size (objects)

Question 7

Congruent segments

Answer 7

Same/equal length

Question 8

Midpoint of a segment

Answer 8

The point that divides one segment into 2 congruent segments

Question 9

Bisector of a segment

Answer 9

A line, segment, ray or plane that intersects a segment at its midpoint

Question 10

Postulates (Axioms)

Answer 10

Statements that are widely accepted as true without proof.

Question 11

Opposite rays

Answer 11

Two rays on the same line that share a common endpoint

Question 12

Collinear Points

Answer 12

Points all on one line

Question 13

Coplanar Points

Answer 13

Points all on one plane

Question 14

Length

Answer 14

The distance between 2 points

Question 15

How to find the distance between 2 endpoints?

Answer 15

Either [Largest # - Smaller #] or [ |#-#| ]

Question 16

How to find the coordinate of a midpoint?

Answer 16

Find the average of the endpoints coordinates

Question 17

Definitions

Answer 17

These are given. Don’t make things up. Know the exact wording.

Question 18

Properties

Answer 18

These are observable and also accepted without proof

Question 19

Theorems

Answer 19

These are statements that require proof (a proof is a logical statement)

Question 20

Midpoint Theorem

Answer 20

If B is the midpoint of line segment AC, then AB=BC , BC=1/2AC , AB=1/2AC