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28 Cards in this Set
- Front
- Back
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What is rotation symmetry of a 3 dimensional figure?
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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.
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What is axis of symmetry?
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the line used in the rotation symmetry.
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What is a vanishing point?
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the point where tracks appear to meet.
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What is the horizon line?
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it contains the vanishing point(s) of a drawing.
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What is a perspective drawing?
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it is made on a 2 dimensional surface in such a way that 3 dimensional objects appear true to life.
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What is a ray?
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a point of a line that begins at one point.
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What is a segment?
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part of a line that begins at one endpoint and ends at another.
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What is a angle?
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its formed by 2 rays that have a common endpoint.
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What is a vertex?
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the endpoint of the angle.
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What is a congruent figure?
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Geometric figures that have exactly the same shape and size .
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What is a similar figure?
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has the same shap but not necessarily the same size
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What is a scale drawing?
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a 2 dimensional drawing that is similar to the object that is represents.
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What is a scale?
(of a drawing) |
the ratio of the size of the drawing to the actual size of the object.
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What is a scale model?
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a 3 dimensional figure whose surface are similar to the corresponding surfaces of the actual object
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What is a coordinate?
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the real number or numbers that correspond to the point.
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What is lenght?(of a segment)
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the distants between its endpoints.
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What is a coordinate plane?
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its formed by two number lines that intersect at their origins.
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What is the x-axis?
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the horizontal number line.
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What is the y-axis?
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the vertical number line.
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What are quadrants?
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the axes divide the coorrdinate plane into 4.
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What is an ordered pair?
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the pair of real numbersthat corresponds to a point.
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What is an ordered triple?
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the triple of real numbers that corresponds to apoint.
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What are octants?
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one of the eight regions into which a 3 dimensional coordinate system is divided by the x-y and z axes.
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What is a midpoint?
(of a segment) |
the point that divides the segment into two congruent segments.
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What is a segment bisector?
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any segment ,ray,line,or plane that intersects a segment at its midpoint.
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What is a conditional statement?
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a statement that can be written in (if then) form.
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What is a hypothesis?
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in a conditional statement that part that follow (if)
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wha is a conlusion?
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in a conditional statement, the part that follows (then)
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