MATH VOCAB STUDY

Question 1

Undefined Terms

Answer 1

Words that do not have formal definitions, but there is an agreement about what they mean.

Question 2

Line

Answer 2

A line has one dimension. It is represented by a line with two arrowheads, but it extends without end.

Question 3

Point

Answer 3

A location in space that is represented by a dot and has no dimension.

Question 4

Plane

Answer 4

A flat surface made up of points that has two dimensions and extends without end, and is represented by a shape that looks like a floor or a wall.

Question 5

Collinear Points

Answer 5

Points that lie on the same line.

Question 6

Coplanar Points

Answer 6

Points that lie in the same plane.

Question 7

Defined Terms

Answer 7

Terms that can be described using known words such as point or line.

Question 8

Line Segment

Answer 8

Consists of two endpoints and all the points between them.

Question 9

Endpoints

Answer 9

Points that represent the ends of a line segment or ray.

Question 10

Ray

Answer 10

Ray AB is a ray if it consists of the endpoint A and all the points on Line AB that lie on the same side of A as B.

Question 11

Opposite Rays

Answer 11

If point C lies on Line AB between A and B, then Ray CA and Ray CB are opposite rays.

Question 12

Intersection

Answer 12

The set of points two or more geometric figures have in common.

Question 13

Postulate

Answer 13

A rule that is accepted without proof.

Question 14

Axiom

Answer 14

A rule that is accepted without proof.

Question 15

Coordinate

Answer 15

A real number that corresponds to a point on a line.

Question 16

Distance

Answer 16

The absolute value of the difference of two coordinates on a line.

Question 17

Construction

Answer 17

A geometric drawing that uses a limited set of tools, usually a compass and a straightedge.

Question 18

Congruent Segments

Answer 18

Line segments that have the same length.

Question 19

Between

Answer 19

When three points are collinear, one points Is between the other two.

Question 20

Midpoint

Answer 20

The point that divides a segment into two congruent segments.

Question 21

Segment Bisector

Answer 21

A point, ray, line, line segment, or plane that intersects the segment at its midpoint.

Question 22

Inscribed Polygon

Answer 22

A polygon in which all of the vertices lie on a circle.

Question 23

Circumscribed Circle

Answer 23

A circle that contains all the vertices of an inscribed polygon.

Question 24

Angle

Answer 24

A set of points consisting of two different rays that have the same endpoint.

Question 25

Vertex

Answer 25

The point where a graph changes direction.

Question 26

Sides of an angle

Answer 26

The rays of an angle.

Question 27

Interior of an angle

Answer 27

The region that contains all the points between the sides of an angle.

Question 28

Exterior of an angle

Answer 28

The region that contains all the points outside of an angle.

Question 29

Measure of an angle

Answer 29

The absolute value of the difference between the real numbers matched with the two rays that form the angle on a protractor.

Question 30

Acute Angle

Answer 30

An angle that has a measure greater than 0 degrees and less than 90 degrees.

Question 31

Right Angle

Answer 31

An angle that has a measure of 90 degrees.

Question 32

Obtuse Angle

Answer 32

An angle that has a measure greater than 90 degrees and less than 180 degrees.

Question 33

Straight Angle

Answer 33

An angle that has a measure of 180 degrees.

Question 34

Congruent Angles

Answer 34

Two angles that have the same measure.

Question 35

Angle Bisector

Answer 35

A ray the divides an angle into two angles that are congruent.

Question 36

Complementary Angles

Answer 36

Two angles whose measures have a sum of 90 degrees.

Question 37

Supplementary Angles

Answer 37

Two angles whose measures have a sum of 180 degrees.

Question 38

Adjacent Angles

Answer 38

Two angles that share a common vertex and side, but have no common interior points.

Question 39

Linear Pair

Answer 39

Two adjacent angles whose noncommon sides are opposite rays.

Question 40

Vertical Angles

Answer 40

Two angles whose sides form two pairs of opposite rays.

Question 41

Reflex Angle

Answer 41

An angle that has a measure greater than 180 degrees but less than 360 degrees.

Question 42

Compass

Answer 42

A tool used to inscribe shapes and angles.

Question 43

Protractor

Answer 43

A tool used for measuring angles.