Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
33 Cards in this Set
- Front
- Back
|
point |
location, has no sides. |
|
|
line |
set of points that extends without end in two oppoiste directions |
|
|
plane |
set of points that extends w/o end in all directions along a flat surface. |
|
|
figure |
any set of points |
|
|
plane figure |
set of points that all lie in the same place. |
|
|
reflection symmetry/ line of symmetry |
when something can be divided along a line into two parts that are mirror images. |
|
|
line of symmetry |
a line that divides a plane figure into two parts that are meer images. |
|
|
rotation symmetry |
When a plane figure turns around a point so it coencides with it's original position during the complete turn two or more times during a complete turn. |
|
|
center of symmetry |
if a plane figure can be turned arounf a point so it coensides with it's original position two or mire times during a complete turn, the point is the center of symmetry. |
|
|
order of rotation symmetry |
The number of times the figure coensides with its original position during the complete turn. |
|
|
nfold |
# of times (see order of rotation symmetry) |
|
|
space |
set of all points |
|
|
solid figures or solid |
3d figure that has all surface points. |
|
|
intersection |
have 2 or more geometric figures in common. |
|
|
cross section |
the intersection of a geometric 3d figure and a plane. |
|
|
net |
A 2d figure that when folded, forms the surface of a 3d figure. |
|
|
2d |
A figure that is only in two dimesions. |
|
|
3d |
A figure that is only in three dimesions |
|
|
depth |
the extent, measurement, or distance downwards, backwards, or inwards |
|
|
ray |
part of a line that begns with one point and extends forever. |
|
|
angle |
figure formed by two rays with a comman endpoint |
|
|
endpoint (point) |
A point at the end of a ray or line (segment) |
|
|
(line) segment |
A part of a line with two endpoints |
|
|
side |
ray(s) of an angle. |
|
|
vertex |
The endpoint of an angle. |
|
|
degree |
a comman unit for measuring angles. |
|
|
Types of angles |
acute, obtuse, reflex, straight, right |
|
|
Tools of Geometery |
Protractor, ruler, compass |
|
|
Similar Figures |
equal angles, sides are proportionate |
|
|
Scale Drawing |
2d drawing that is similar to what it represents |
|
|
Scale |
size of drawing: size of object |
|
|
Scale Model |
A 3d figure whose surfaces are similar to the cooresponding surfaces of the actual object. |
|
|
congruent |
Exactly equal in size and shape. Congruent sides or segments have the exact same length. Congruent angles have the exact same measure. For any set of congruent geometric figures, corresponding sides, angles, faces, etc. are congruent. |
