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15 Cards in this Set
- Front
- Back
Plane
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a flat surface without thickness, extending in all directions
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adjacent angles
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two angles with a common side, a common vertex and no common points within the angles
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perpendicular lines
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lines that intersect to form right angles
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parallel lines
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lines in the same plane that never interesect
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congruent angles
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angles that have the same measure
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right angle
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has a measure of 90 degrees
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intersecting lines
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lines that meet or cross
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line segment
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all the points on the straight path between two points, ioncluding those two points called endpoints
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straight angle (supplemementary angles)
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has a measure of 180 degrees, its sides form a straight line
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obtuse angle
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has a measure greater than 90 degrees but less than 180 degrees
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Perpendicular lines
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two lines that intersect and form right angles
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Line
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a line that continues in both directions
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Ray
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a line that has an endpoint and extends on in one direction
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Point
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a dot
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Complementary angles
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its angles combine to a measure of 90 degrees
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