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28 Cards in this Set
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 Back
What is rotation symmetry of a 3 dimensional figure?

It is if the figure can be turned around a line so it coincides with its original position two or more time during a complete turn.


What is axis of symmetry?

the line used in the rotation symmetry.


What is a vanishing point?

the point where tracks appear to meet.


What is the horizon line?

it contains the vanishing point(s) of a drawing.


What is a perspective drawing?

it is made on a 2 dimensional surface in such a way that 3 dimensional objects appear true to life.


What is a ray?

a point of a line that begins at one point.


What is a segment?

part of a line that begins at one endpoint and ends at another.


What is a angle?

its formed by 2 rays that have a common endpoint.


What is a vertex?

the endpoint of the angle.


What is a congruent figure?

Geometric figures that have exactly the same shape and size .


What is a similar figure?

has the same shap but not necessarily the same size


What is a scale drawing?

a 2 dimensional drawing that is similar to the object that is represents.


What is a scale?
(of a drawing) 
the ratio of the size of the drawing to the actual size of the object.


What is a scale model?

a 3 dimensional figure whose surface are similar to the corresponding surfaces of the actual object


What is a coordinate?

the real number or numbers that correspond to the point.


What is lenght?(of a segment)

the distants between its endpoints.


What is a coordinate plane?

its formed by two number lines that intersect at their origins.


What is the xaxis?

the horizontal number line.


What is the yaxis?

the vertical number line.


What are quadrants?

the axes divide the coorrdinate plane into 4.


What is an ordered pair?

the pair of real numbersthat corresponds to a point.


What is an ordered triple?

the triple of real numbers that corresponds to apoint.


What are octants?

one of the eight regions into which a 3 dimensional coordinate system is divided by the xy and z axes.


What is a midpoint?
(of a segment) 
the point that divides the segment into two congruent segments.


What is a segment bisector?

any segment ,ray,line,or plane that intersects a segment at its midpoint.


What is a conditional statement?

a statement that can be written in (if then) form.


What is a hypothesis?

in a conditional statement that part that follow (if)


wha is a conlusion?

in a conditional statement, the part that follows (then)
