Geo Math Flash Crads

Front 1

Point

Back 1

A location in space. It has no true size.

Front 2

Line

Back 2

A series of points that extend in both directions forever.

Front 3

Plane

Back 3

A flat surface with no thickness. It contains many lines and extends without end in the directions of all it's lines.

Front 4

Line Segment

Back 4

A part of a line that has two exact endpoints.

Front 5

Ray

Back 5

A part of a line that has exactly one endpoint.

Front 6

Intersect

Back 6

Lines that either cross each other at a common or meet at a common point.

Front 7

Parallel

Back 7

Two lines that will never touch each other.

Front 8

Skew

Back 8

Lines that aren't parallel, but will never touch each other.

Front 9

Angle

Back 9

Angles are made up of two rays meeting at a vertex.

Front 10

Vertex

Back 10

A point where two rays meet.

Front 11

Acute Angle

Back 11

An angle less than 90º but more than 0º.

Front 12

Right Angle

Back 12

An angle that is exactly 90º.

Front 13

Obtuse Angle

Back 13

An angle that is bigger than 90º and less than 180º.

Front 14

Straight Angle

Back 14

An angle that forms a straight line.

Front 15

Adjacent Angles

Back 15

Share a vertex and a ray but no points in their interiors.

Front 16

*Vertical Angles*

Back 16

Are formed by two intersecting lines and are opposite each other.They have that same measurement.

Front 17

Congruent Angles

Back 17

Angles that have the same measurement.

Front 18

*Supplementary Angles*

Back 18

When the sum of the measures of two or more angles adds up to 180º.

Front 19

*Complementary Angles*

Back 19

When the sum of the measures of two or more angles adds up to 90º.

Front 20

Corresponding Angles

Back 20

Angles that are in the same position as another angle.

Front 21

Transversal

Back 21

When a line intersects two other lines in different points.

Front 22

Alternate Interior Angles

Back 22

Are in the interior of a pair of lines on opposite sides of the transversal.

Front 23

Alternate Exterior Angles

Back 23

Are on the exterior of a pair of lines on opposite sides of the transversal.

Front 24

Polygon

Back 24

A closed plane figure with at least three sides.

Front 25

Regular Polygon

Back 25

Has all sides congruent and all angles congruent.

Front 26

Triangle

Back 26

A polygon with three sides and is classified by it's sides and angles.

Front 27

Acute Triangle

Back 27

All angles are less than 90º.

Front 28

Right Triangle

Back 28

One right angle and two acute angles.

Front 29

Obtuse Triangle

Back 29

One obtuse angle and two acute angles.

Front 30

Equalateral Triangle

Back 30

All sides are congruent and all angles are 60º.

Front 31

Isosceles Triangle

Back 31

Two congruent sides and two congruent angles.

Front 32

Scalene Triangle

Back 32

No congruent sides or angles.

Front 33

Radius

Back 33

A segment that has one end point at the center of the circle and the other point on the circle.

Front 34

Diameter

Back 34

A chord that passes through the center of the circle.

Front 35

Circumference

Back 35

The distance around the circle (the perimeter).

Front 36

Chord

Back 36

Any segment whose endpoints are on the circle.

Front 37

Central Angle

Back 37

An angle whose vertex is the center of the circle.

Front 38

Circle

Back 38

The set of all the points the same distance away from a given point, called the center of the circle.

Front 39

Quadrilateral

Back 39

A four sided polygon.

Front 40

Trapezoid

Back 40

A quad with exactly one pair of parallel sides.

Front 41

Parallelogram

Back 41

A quad with opposite sides parallel and congruent.

Front 42

Rhombus

Back 42

A quad with opposite sides parallel and four sides congruent.

Front 43

Rectangle

Back 43

A quad with opposite sides parallel and congruent, there are four 90º angles.

Front 44

Square

Back 44

A quad with four sides parallel and congruent and four 90º angles.