

Rectangular Prism 
 


Triangular Prism 
 


Rectangular Pyramid 
 


Square Pyramid 
 


Sphere 
 


Cylinder 
 


Cone 
 
A flat shape 

Plane Figure 
 
Three dimensions, length, width, and height 

Solid Figure 
 
A flat surface on a solid figure 

Face 
 
3 or more edges meet 

Vertex 
 
Line segment where 2 faces meet 

Edge 
 
Pattern that can be used to make a solid 

Net 
 
A closed plane figure made up of line segments 

Polygon 
 
3 Sides 

Triangle 
 
4 Sides 

Quadrilateral 
 
5 Sides 

Pentagon 
 
6 Sides 


 
8 Sides 

Octogon 
 
An exact location in space 

Point 
 
A straight path of points that goes on and on in 2 directions 

Line 
 
Part of a line. Has two endpoints 

Line segment 
 
Part of a line. Has 1 endpoint and continues on in 1 direction 

Ray 
 
Formed by 2 rays that have the same endpoint 

Angle 
 
Common endpoint in an angle 

Vertex 
 
A square corner
(90 degrees) 

Right Angle

 
Less than a right angle (< 90 degrees) 

Acute Angle

 
Greater than a right angle (> 90 degrees) 

Obtuse Angle

 
Forms a straight line
(180 degrees) 

Straight Angle

 
Lines that never intersect 

Parallel Lines

 
Lines that pass through the same point 

Intersecting Lines

 
Lines that form right angles 

Perpendicular Lines

 
Triangle with all sides the same length 

Equilateral Triangle

 
Triangle where at least 2 sides are the same length 

Isosceles Triangle

 
No sides of the triangle are the same length 

Scalene Triangle

 
One angle of the triangle is 90 degrees 

Right Triangle

 
All 3 angles of the triangle is < 90 degrees 

Acute triangle

 
One angle of the triangle is > 90 degrees 

Obtuse Triangle

 
4 right angles 

Rectangle

 
4 right angles and all sides are the same length 

Square

 
There is only one pair of parallel sides 

Trapezoid

 
Opposite sides are parallel 

Parallelogram

 
Opposite sides are parallel and all sides are the same length 

Rhombus

 
Closed plane figure with all points the same distance from the point 

Circle

 
Point in the middle of the circle 

Center

 
Any line segment that connects 2 points on the circle and passes through the center 

Diameter

 
Any line segment that connects the center to a point on the circle 

Radius

 
Any line segment that connects 2 points on a circle 

Chord

 
Moves a figure in a straight direction 

Slide or translation

 
Mirror image of a figure 

Flip or reflection

 
To move a figure about a point 

Turn or rotation

 
Figures that have the same size and shape 

Congruent

 
Tile patters that can be drawn by sliding, flipping, or turning shapes 

Tessellations

 
A figure that can be folded into 2 congruent halves that fit on top of eachother 

Symmetric

 
When folding a symmetric figure you create a ___ __ ______ 

Line of Symmetry

 
Figures that have the same shape but may or may not have the same size 

Similar Figures

 
The distance around a figure 

Perimeter (L+L+W+W)

 
The number or square units to cover the region inside a figure 

Area (L x W)

 
Sum of the area of all of its faces on a prism 

Surface Area

 
Number of cubic units needed to fill a solid figure 

Volume (L x W x H)

 