Geometry Vocabulary

Total Flash Cards » 60
 
1. 


 

Rectangular Prism

 
2. 


 

Triangular Prism

 
3. 


 

Rectangular Pyramid

 
4. 


 

Square Pyramid

 
5. 


 

Sphere

 
6. 


 

Cylinder

 
7. 


 

Cone

 
8. 

A flat shape

 

Plane Figure

 
9. 

Three dimensions, length, width, and height

 

Solid Figure

 
10. 

A flat surface on a solid figure

 

Face

 
11. 

3 or more edges meet

 

Vertex

 
12. 

Line segment where 2 faces meet

 

Edge

 
13. 

Pattern that can be used to make a solid

 

Net

 
14. 

A closed plane figure made up of line segments

 

Polygon

 
15. 

3 Sides

 

Triangle

 
16. 

4 Sides

 

Quadrilateral

 
17. 

5 Sides

 

Pentagon

 
18. 

6 Sides

 


 
19. 

8 Sides

 

Octogon

 
20. 

An exact location in space

 

Point

 
21. 

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

 

Line

 
22. 

Part of a line. Has two endpoints

 

Line segment

 
23. 

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

 

Ray

 
24. 

Formed by 2 rays that have the same endpoint

 

Angle

 
25. 

Common endpoint in an angle

 

Vertex

 
26. 

A square corner

(90 degrees)

 

Right Angle


 
27. 

Less than a right angle (< 90 degrees)

 

Acute Angle

 
28. 

Greater than a right angle (> 90 degrees)

 

Obtuse Angle

 
29. 

Forms a straight line

(180 degrees)

 

Straight Angle

 
30. 

Lines that never intersect

 

Parallel Lines


 
31. 

Lines that pass through the same point

 

Intersecting Lines


 
32. 

Lines that form right angles

 

Perpendicular Lines


 
33. 

Triangle with all sides the same length

 

Equilateral Triangle


 
34. 

Triangle where at least 2 sides are the same length

 

Isosceles Triangle


 
35. 

No sides of the triangle are the same length

 

Scalene Triangle


 
36. 

One angle of the triangle is 90 degrees

 

Right Triangle

 
37. 

All 3 angles of the triangle is < 90 degrees

 

Acute triangle


 
38. 

One angle of the triangle is > 90 degrees

 

Obtuse Triangle


 
39. 

4 right angles

 

Rectangle


 
40. 

4 right angles and all sides are the same length

 

Square

 
41. 

There is only one pair of parallel sides

 

Trapezoid

 
42. 

Opposite sides are parallel

 

Parallelogram

 
43. 

Opposite sides are parallel and all sides are the same length

 

Rhombus

 
44. 

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

 

Circle

 
45. 

Point in the middle of the circle

 

Center

 
46. 

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

 

Diameter

 
47. 

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

 

Radius

 
48. 

Any line segment that connects 2 points on a circle

 

Chord

 
49. 

Moves a figure in a straight direction

 

Slide or translation

 
50. 

Mirror image of a figure

 

Flip or reflection

 
51. 

To move a figure about a point

 

Turn or rotation

 
52. 

Figures that have the same size and shape

 

Congruent

 
53. 

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

 

Tessellations

 
54. 

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

 

Symmetric

 
55. 

When folding a symmetric figure you create a ___ __ ______

 

Line of Symmetry

 
56. 

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

 

Similar Figures

 
57. 

The distance around a figure

 

Perimeter (L+L+W+W)

 
58. 

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

 

Area (L x W)

 
59. 

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

 

Surface Area

 
60. 

Number of cubic units needed to fill a solid figure

 

Volume (L x W x H)