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Geometry (Disbrow)

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
Reflect across x-axis (rule)   (x,-y)  
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Reflect across y-axis (rule)   (-x,y)  
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Reflect across y=x (rule)   (y,x)  
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Rotate 90 degrees (rule)   (-y,x)  
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Rotate 180 degrees (rule)   (-x,-y)  
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What is a translation? (definition)   A transformation that shifts or slides every point of a figure in the same distance and direction.  
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What is plane symmetry? (definition)   A three dimentional figure that can be divided into two conguent reflected halves by a plane.  
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What is a vector? (definition)   A quantity that has both magnitude and direction.  
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What is the Line of Symmetry? (definition)   A line that divides a plane figure into two congruent reflected halves.  
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What does it mean when two or more points are "coplanar"?   The points lie on the same plane.  
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What does it mean when two or more points are "collinear"?   The points lie on the same line.  
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What is an undefined term? (definition)   Cannot be defined using other figures.  
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What is a point? (definition)   An undefined term in Geometry; it has a location and has no size.  
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What is a line? (definition)   An undefined term in Geometry; a line is a straight path that has no thickness and continues to an infinitive.  
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What is a vertex? (definition)   The intersectionof two or more lines, segments, rays, or planes.  
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What is a Segment? (definition)   A part of a line consisting of two endpoints and all points between them.  
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What is a plane? (definition)   An undefined term in Geometry; a flat surface, no thickness, never-endng.  
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What does it mean when you have "opposite rays"? (definition)   Two rays that have the same endpoint an form a line in opposite diections.  
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How do you label a point?   Using Capital Letters.  
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How do you label a line?   Using a lowercase cursive letter or two points.  
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How do you label a vertex?   Using capital letters.  
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How do you label a plane?   Using 3 points on the plane.  
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How do you label a line segment?   Write the two endpoints with a bar above them.  
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How do you label an endpoint?   Using capital letters.  
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How do you label a ray?   Writing the endpoint and the other point on the ray.  
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How do you label opposite rays?   Write the common endpoint, then the other point on the rays.  
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