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If two line segments are congruent, that means that they are of equal lengths

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A plane is a flat surface that extends into infinity. 

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A floor is a good example of this because it is completely flat.

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line segment is bounded by two distinct points on a line

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The perimeter of a shape is defined as the total length of its boundary.

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The 3 point perimeter is boundary where within it you can score 2 points.

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A circle is a round-shaped figure that has no corners or edges.

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Neptune is a circle because it has no corners or edges.

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A three-sided polygon, which has three vertices. The three sides are connected with each other end to end at a point

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This chip is an example of triangle because of the shape it makes.

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a plane figure with four equal straight sides and four right angles.

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A plane figure with four straight sides and four right angles, especially one with unequal adjacent sides, in contrast to a square.

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This chocolate bar is in the of a rectangle

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A ray that that divides into 2 congruent angle. 

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A kite is a great example of an angle bisector because its main structure divides it into 4 congruent angles to help it balance

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Points and lines that belong on the same plane.

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Although the points are not all on the same side or face of the tissue box, they are all on the same plane which includes the whole object.

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 A pair of adjacent, supplementary angles.

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This T intersection represents a linear pair because the lines are both supplementary and adjacent.

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A par of non-adjacent angles whose sides are opposite rays. 

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This 4 way stop represents 2 veritacl angles.

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When the clock hits 3 o'clock or 9 o'clock, the hands measure to exactly 90 degrees.

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Measure is bigger than 90 degrees but less than 180.

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This lounge chair would open up to a measure of above 90 degrees.

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Measure is between 0 and 90 degrees but not including 90

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This small pizza slice would measure somewhere in between 0-90 degrees.

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two lines in the same plane that are at equal distance from each other and never meet.

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Railroad tracks are connected by two parallel lines that will never intersect.

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Represented by a straight path that extends in two opposite directions without an end and no thickness. 

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The sides of the Ladder represent a line given that they are two straight paths that extend in two opposite directions.

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This point of the lead indicates the end of the pencil or the beginning of the Lead.