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Chapter 1 Vocabulary

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Across
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A flat surface that extends forever in all directions. Named by three non-collinear points or by a capital script letter.
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A polygon with 7 sides.
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Lines that intersect to form right angles.
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On the same plane.
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Angles with a sum of 90 degrees.
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When no vertex or side of a polygon is in the interior.
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A solid whose bases are circles.
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An angle that measures exactly 180 degrees.
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A closed plane figure with 3 or more sides.
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An angle measuring 90 degrees.
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A pair of angles that share a side and the non-adjacent sides form a line.
Down
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An angle measuring less than 90 degrees.
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Location. Named by a capital letter.
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Extends forever in 2 directions. Named by two capital letters or a lower case script letter.
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Formed by two rays with a common endpoint.
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Angles with a sum of 180 degrees.
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Having the same measure.
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Angles formed by intersecting lines that do not share a side.
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A polygon with all sides congruent and all angles congruent.
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An angle measuring greater than 90 degrees.