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19 Cards in this Set
- Front
- Back
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point
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an exact location in space
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line
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a straight path of points that goes on forever in two directions
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ray
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part of a line with one endpoint, extending forever in only one direction
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line segment
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part of a line with two endpoints
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midpoint
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the point halfway between the endpoints of a line segment
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congruent line segments
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line segments with the same length
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plane
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a flat surface that extends forever in all directions
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intersecting lines
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pass through the same point
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parallel lines
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are in the same plane but do not intersect
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perpendicular lines
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are intersecting lines that form right angles (square corners)
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skew lines
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lie in different planes. They do not intersect and are not parallel.
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intersecting planes
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pass through the same line
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perpendicular planes
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are intersecting planes that form a right angle
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angle
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formed by two rays that have the same endpoint
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angles are measured in
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degrees
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acute angle
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between 0° and 90°
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right angle
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exactly 90°
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obtuse angle
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between 90° and 180°
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straight angle
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exactly 180°
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