Study your flashcards anywhere!
Download the official Cram app for free >
 Shuffle
Toggle OnToggle Off
 Alphabetize
Toggle OnToggle Off
 Front First
Toggle OnToggle Off
 Both Sides
Toggle OnToggle Off
 Read
Toggle OnToggle Off
How to study your flashcards.
Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key
Up/Down arrow keys: Flip the card between the front and back.down keyup key
H key: Show hint (3rd side).h key
A key: Read text to speech.a key
54 Cards in this Set
 Front
 Back
Point

A position in space that has no dimension


Line

A never ending straight path


Ray

(a line with) 1 endpoint


Line Segment

(a piece of a line with) 2 endpoints


Intersecting Line

2 lines that meet at 1 point


Perpendicular Line

Lines that meet to form a right angle


Plane

A flat surface that extends in all directions


Parallel Lines

Lines on the same plane that will never meet


Skew Lines

Lines not in the same plane that will never meet


Right Angle

90º


Acute Angle

>90º


Angle

A figure formed by 2 rays extending from 1 vertex


Obtuse Angle

<90º but >180º


Straight Angle

180º


Reflex Angle

<180º


Adjacent Angles

Angles that share a common vertex and a common ray


Vertex

A point in an angle where 2 rays meet


Vertical Angle

2 nonadjacent angles formed when 2 lines intersect
They are Congruent 

Corresponding Angles

Angles that match in position when a parallel lines are cut by a transversal
They are congruent 

Alternate Interior Angles

They are congruent


Alternate Exterior Angle

They are congruent


Complementary Angles

2 angles whose sum is 90º


Supplementary Angles

2 angles whose sum is 90º


Transversal

A line that intersects 2 angles


Equilateral Triangle

A triangle with all sides and angles congruent.
All angles 60º 

Isosceles Triangle

A triangle with at least 2 congruent sides
2 equal angles on the different sides are congruent 

Scalene Triangle

A triangle with no congruent sides


Right Triangle

A triangle with 1 right angle


Obtuse Triangle

A triangle with 1 obtuse angle


Acute Angle

A triangle with 3 acute angles


Equilateral Triangle

A triangle with all sides and angles congruent


Polygon

A many sided figure


Triangle

A three sided figure


Quadrilateral

A 4 sided figure
360º 

Pentagon

A 5 sided figure
540º 

Hexagon

A 6 sided figure
720º 

Septagon
or Heptagon 
A 7 sided figure
900º 

Octagon

An 8 sided figure
1080º 

Nonagon

A 9 sided figure
1260º 

Decagon

A 10 sided figure
1440º 

Dodecagon

A 10 sided figure
1620º 

A Regular Polygon

A sides and angles the same


Parallelogram

A quadrilateral 2 pairs of parallel sides


Rectangle

A parallelogram with a right angle


Rhombus

A parallelogram congruent sides
There are no right angles 

Square

A special Rectangle
with congruent sides A Special Rhombus with 1 right Angle 

Trapeziod

A Quadrilateral with exactly 1 pair of parallel sides


Kite

Quadrilateral with 2 pairs of adjacent and congruent sides


Circle

A plane with all parts equidistant from a given point called the center


Diameter

A chord that passes the center of the circle
2 radius 

Radius

A line segment that connects the center and any point on the circle


Central Angle

An angle whose vertex is the center of the circle and whose rays contain the radii of of the circle


Inscribe Angle

an angle whose vertex lies on the circle and whose rays contain chords of the circle


Intercepted Arc

A piece of the circle between the two rays
