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22 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 and on in two directions
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Line Segment
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part of a line
has two endpoints (a start and an end) |
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Ray
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part of a line
has one endpoint and continues on and on in only one direction |
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Angle
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formed by two rays that have the same endpoint
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Vertex
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the common endpoint of an angle
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Degree
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the unit of measure for an angle
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Plane
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an endless flat surface
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Acute Angle
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an angle that measures greater than 0 degrees but less than 90 degrees
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Right Angle
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an angle that measures exactly 90 degrees
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Obtuse Angle
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an angle that measures greater than 90 degrees but less than 180 degrees
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Straight Angle
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an angle that measures exactly 180 degrees
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Reflex Angle
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an angle that measures greater than 180 degrees but less than 360 degrees
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Circle
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exactly 360 degrees
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Parallel Lines
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lines in a plane that never intersect
always the same distance apart at every point |
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Intersecting Lines
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lines that cross at one point
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Perpendicular Lines
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lines that intersect to form four right angles
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Quadrilateral
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polygon with 4 sides
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Pentagon
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polygon with 5 sides
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Hexagon
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polygon with 6 sides
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Octagon
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polygon with 8 sides
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Decagon
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polygon with 10 sides
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