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### 28 Cards in this Set

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 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 x-axis? the horizontal number line. What is the y-axis? 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 x-y 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)