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29 Cards in this Set
- Front
- Back
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Point |
Identifies a location, no sizeli
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Line
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A set of points that extends without end in two opposite directions
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Plane
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A set of points that extends without ends in all directions along a flat surface
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Figure
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Any set of points
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Plane figure
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A set of points that all lie in the same plane
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Reflection symmetry/line symmetry
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When something can be divided along a line, into two parts that are mirror images
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Line of symmetry
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A line that divides a plane figure into two parts that are mirror images
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Rotational symmetry
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When a plane figure can be turned around a point so it coincides with its original position 2+ times during a complete turn
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Center of symmetry
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If a plane figure can be turned around a point so it coincides with its original position two or more times during a complete turn the point is the center of symmetry
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Order of rotational symmetry (n~fold) |
The number of times the figure coincides with its original position during the complete turn |
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Space |
Set of all points |
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Solid figures or solid
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3-D figure that has all surface points and all the points the surfacing encloses
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Intersection
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All points that two or more geometric figures have in common
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2d
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2 dimensions
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3D
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3 dimensions
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Cross section
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The intersection of a 3-D figure and a plane
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Net
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A two dimensional figure when folded, forms the surface of 3D figure
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Angle
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Figure formed by 2 rays with a common end point
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End point
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A point at the end of a ray/ line segment
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Line segment
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A part of a line that has 2 end points
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Ray
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Part of a line that begins with a point and extends forever
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Side
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Ray(s) of the angle
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Vertex
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End point of an angle
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Degree
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A common unit for measuring angles
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Similar figures
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(~) equal angle's sides are proportional
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Scale
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Size of drawing:size of object
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Scale model
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3D figure object whose surfaces are similar to the corresponding surfaces of the actual object
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Collinear
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2 points on the same line
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Scale drawing |
2D drawing that is similar to what it represents |
