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32 Cards in this Set
- Front
- Back
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point
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no size
represented by a dot has location |
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line
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collection of points going in opposite directions
no thickness one dimensional |
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Plane
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flat surface
goes on forever in all directions 2 dimensional has no bounds need at least 3 points to name it |
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Space
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collection of all points
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Collinear points
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points that are on the same line
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non-collinear points
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points that are not on the same line
need at least 3 points to be non-collinear |
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coplanar points
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points in the same plane
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non-coplanar points
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points not on the same plane
need at least 4 points to be non-coplanar |
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segment
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section of a line with 2 end points
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ray
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section of a line with one endpoint and all points extending in one direction from the endpoint
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opposite rays
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rays with the same endpoint headed in opposite directions
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congruent segment
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segments with the same length
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midpoint of a segment
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divides the segment into two congruent segments
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bisector of a segment
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a line, ray, segment, or a plane that goes through the midpoint of a segment.
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angle
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a figure formed by two rays that have the same endpoint
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acute angle
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between 0º and 90º
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right angle
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90º
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obtuse angle
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between 90º and 180º
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adjacent angles
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angles with a common vertex and a common side
one is NOT inside the other |
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bisector of an angle
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a ray that divides an angle into two congruent angles
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perpendicular lines
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two lines that form right ∠'s
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vertical ∠'s
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2 ∠'s whose sides form two pairs of opposite rays
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complementary ∠'s
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2 ∠'s whose sum is 90º
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supplementary ∠'s
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2 ∠'s whose sum is 180º
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Parallel lines
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coplanar lines that do not intersect
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skew lines
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noncoplanar lines that do not intersect
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parallel planes
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planes that do not intersect
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transversal
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a line that intersects two or more coplanar lines
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corresponding ∠'s (corr ∠'s)
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tow ∠'s in corresponding positions
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alternate interior ∠'s (AIA's)
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2 nonadjacent interior ∠'s on oppposite sides of a transversal
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alternate exterior ∠'s (AEA's)
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outside opposites
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Same-Side Interior ∠'s (SII's)
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∠'s on the same side of the transversal within the two lines
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