Vocab

Question 0

Inductive reasoning

Answer 0

Looking for patterns and making conjectures.

Question 1

Conjecture

Answer 1

An unproven statement based on observations.

Question 2

Counter example

Answer 2

An example that shows a conjecture false.

Question 3

Point

Answer 3

No dimensions, represented by a small dot

Question 4

Line

Answer 4

Straight line with 2 arrowheads to show the line extends in both directions without end.

Question 5

Plane

Answer 5

Extends in 2 directions without end. Represented by a shape like a tabletop or a wall

Question 6

Collinear

Answer 6

Points that lie on the same line.

Question 7

Coplanar

Answer 7

Points that lie on the same plane.

Question 8

Segment

Answer 8

Consist of end points A&B and all points in between.

Question 9

Endpoints

Answer 9

Points at the end.

Question 10

Ray

Answer 10

Consists of an initial point A and all points AB that lie on the side of A as B.

Question 11

Initial point

Answer 11

If C between A&B, then CA and CB are opposite rays.

Question 12

Intersect

Answer 12

2 or more geometric figures intersect if they have one or more points in common.

Question 13

Intersection

Answer 13

The set of all points the figures have in common.

Question 14

Postulate or axiom

Answer 14

Rules that are accepted without any proof.

Question 15

Congruent segments

Answer 15

Segments that have the same length.

Question 16

Ruler Postulate

Answer 16

The points on a line can be matched with real numbers. The real number that corresponds to a point is a coordinate. The distance between points A&B written as AB is the absolute value of the difference between A&B.

Question 17

Segment Addition Postulate

Answer 17

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

Question 18

Angle

Answer 18

2 different rays with the same initial point.

Question 19

Sides

Answer 19

The rays are the sides of the angle.

Question 20

Vertex

Answer 20

The initial point is the vertex of the angle

Question 21

Congruent angles

Answer 21

Angles that have the same measure.

Question 22

Interior

Answer 22

A point is in the interior of an angle if it is between that lie on each side of the angle.

Question 23

Exterior

Answer 23

A point on the outside if it is not on the interior on the angle itself.

Question 24

Acute

Answer 24

Angle that measures >0 degrees and < 90 degrees.

Question 25

Right angle

Answer 25

Angle measures exactly 90 degrees.

Question 26

Obtuse angle

Answer 26

Angle measure >90 degrees but <180 degrees.

Question 27

Straight angle

Answer 27

Measures at exactly 180 degrees.

Question 28

Adjacent angles

Answer 28

2 angles are next to each other if they share a common vertex and side but have no common interior points.

Question 29

Protractor postulate

Answer 29

Measure of <AOC is the absolute value of the difference between the real numbers for OA and OC.

Question 30

Angle Addition Postulate

Answer 30

If P is in the interior of <RST.